Grand Theft Auto IV

Grand Theft Auto IV

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Chain Reaction

Chain Reaction

You exploded 10 vehicles in 10 seconds.

How to unlock the Chain Reaction achievement in Grand Theft Auto IV - Definitive Guide

Here's a sure-fire method involving motorcycles, which can be bunched together in a much smaller space than cars and will blow up easier as a result.

1. There's a motorcycle dealership in northern Alderny, you can find it on this map and set yourself a waypoint in the game: http://www.gta4.net/map/?lat=33.75&lng=-52.646484375&amp...

(edit: Updated the link.)

2. Call Packie and have him drop a bomb off for you nearby.

3. Place the bomb on a car, and drive it into the motorcycle shop.

4. There should be maybe eight motorcycles parked in this shop, use your car to pack them tightly together, preferably in a line.

5. Once you have them smushed together, park your car on one side of the line.

6. Jack another car, park it on the opposite side. This should bring you up to ten. Count and make sure you have 10 vehicles. In the comments, con2king suggests packing in a few extra cars, which couldn't hurt.

7. You might not even need it, I didn't, but stand outside of the dealership with your rocket launcher and then call Packie to detonate the bomb.

8. Everything should blow up real nice. If not, make use of your rockets quickly.
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09 Jan 2009 01:55

39 Comments
Awesome link!
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By Kloxicon on 20 Jan 2012 23:09
Did this 1st try without Rocket Launcer...NICE!!!
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By D1v1dedL1nes on 04 Jan 2012 16:29
This can be done with just the rocket launcher if you can't phone a friend for a bomb. But is quick and easy either way.
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By GameTagwastaken on 12 Jan 2009 18:07
i didn't get it either i had 8 bikes and 4 cars used packies bomb and RPGs still didn't get it.
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By LBCeroy on 21 May 2009 01:06
All I can think of is that some of the vehicles might have just not blown up quite in time (sometimes cars will burn for a bit before popping), or maybe the achievement is a little bugged. I'd really try packing the bikes in as tightly as possible, and maybe trying to see if you can jack a nearby rider so you can bring it down to one car, though that might get the police on your tail.
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By StealFrmWork on 21 May 2009 01:15
this worked first try without bomb. just have all the bikes piled up in front of a car and a suv. shoot the suv with an rpg and everything should explode, cheevo pop.
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By Price de Nice on 28 Oct 2009 17:17
where is this place i cnt find it
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By Uber Old Acc on 26 Nov 2009 00:02
the location of the bike shop is in between the pay and spray and the burger shot in leftwood if you drive around for a bit you will find it, this idea does work first try and i didnt even use the car bomb just pushed all 8 bikes up near the back with a smoking car and the one i used to push it all in there once it was in the back corner of the bike shop i sent one rpg into the bikes which also blew up the smoking car then sent a second rpg into the car i used to push it all in there then legged it from the cops
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By Siasus on 06 Dec 2009 17:00
I can't do this method, because the police always come and kill me..
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By SecondHeartbeat on 21 Dec 2009 20:14
It's so Easy !
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By AlexThedark25 on 16 Jan 2010 15:01
Great method. Got it on my 1st try
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By Gabriel Man 187 on 23 Jan 2010 19:23
It annoys me that you can only have 8 rockets as this is what effs me up.
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By UlteriorDesert on 30 Jul 2010 14:32
I will Record a video for this solution some time and post a link if you would like, to prevent confusion.
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By Kahuna28 on 15 Aug 2010 11:47
Bike shop worked first time for me, thanks!
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By TENBAPPS on 17 Jan 2011 19:50
does anyone know if this woks on the tales from liberty city disk?
TIA
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By tm1985 on 20 Jan 2011 20:03
Worked a treat thanks! Pushed all the bikes together using a car (don't get on each bike because you will immediately get the cops on your back). When I did it there was 8 bikes and I put two cars either side as suggested. Rolled a grenade under the cluster of bikes and as soon as it went off I got the achievement! Excellent!
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By Poprin on 04 Feb 2011 22:56
That map doesn't tell us where the hell the motorcycle dealership is. I'll change my vote to positive when you provide a location in the solution.
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By CracKforBrumak on 10 Mar 2011 10:53
Here is the actual location of the motorcycle shop
http://snapmap.wikigta.org/index.php?map=IV_NW&title=&am...,263
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By CracKforBrumak on 10 Mar 2011 10:57
There's a legend on the right side of the page that lets you enable whatever location types you want pointed out on the map, and under "Vehicles" you will find "Motorcycles". Click that, and it's the only motorcycle shop in northern Alderny. Alternatively, you can type "motorcycles" into the "Find" box and get the same blip on the map.
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By StealFrmWork on 10 Mar 2011 14:56
Got it on the fourth try. Here's a tip. When you're getting the last vehicle, point your gun at the driver until he gets out and flees, then steal the car. You won't get wanted this way and the guy won't come after you. lol
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By Jon312K on 12 Apr 2011 23:48
I used the map and went where it said found gas station no bike shop piled cars 3 cars wide by 4 cars deep between the pumps had to use codes to lower wanted level. Once u got the cars loaded up in rows go across the street and shoot the gas pump with sniper riffle. Mite want to add this worked numerous time.
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By NiteJokester on 17 Jun 2011 12:06
I kept having problems with the police at the bike shop, and I didn't want to use any cheats. So I just stole one bike at a time and parked it in the reserved area in front of my safehouse just a few blocks away from the shop. when I had all of the vehicles I needed I saved the game just in case it didn't work the first time. Then lined them up with a car on each side and detonated the bomb. I had my rocket launcher on standby just in case but didn't need it, and it worked perfectly first try.
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By CombatRok on 02 Dec 2011 02:16
8 bikes, 3 cars and 1 grenade. first time too
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By ChadMarc on 14 May 2012 17:20
Thanks, got it second try, 7 bikes, 4 cars and one grenade. I just failed the 1st time because i got on one of the bikes, and police showed up. Secrete is to just push them with a car.
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By LanEvoIX on 31 May 2012 01:24
Map link is a dud now.
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By Sabanata on 17 Sep 2013 14:44
I just got it after parking three cars in there.
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By boldfoxrd on 21 May 2014 12:03
I'm having trouble finding this location, anyone with a map location? Thanks!
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By Armstrong x360a on 08 Jun 2014 01:11
The dealership is on the corner of Lemhi st. and Sacramento rd.
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By AngryKamehameha on 06 Aug 2016 13:50
I've done the achievement, but I definitely suffered similar problems to SecondHeartbeat in that the police were bothering me a lot. In the end I just piled the 8 bikes plus 3 cars together, shot it all with one rocket and finished it off with another one. Tedious as hell but it did the trick.
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By ZacaroniChizzy on 25 Oct 2016 14:06
Since the link isn't working, here's one:
http://i.imgur.com/hdl5x6S.jpg
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By Purple DinDono on 08 Dec 2016 16:39
Tried it with the car bomb twice, didn't work. Did it again, but with a grenade, and a few rockets, worked then.
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By EarthboundX on 25 Feb 2017 07:15
Bike shop worked for me. Avoid being wanted by simply driving a car, already loaded with Packie's bomb through the window of the motorcycle shop and use the car to push the bikes up against the wall. Don't ever get on a motorbike and you don't become wanted oddly enough.
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By frenchmau5 on 12 Mar 2017 16:55
Great solution. Got this without getting on a motorcycle or phoning for a bomb. Just pushed all the motorcycles into a group with a car, then placed three cars around them and shot it with my RPG. One shot and the achievement popped.
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By Ethigy on 02 Nov 2018 03:32
What ever method i try it wont unlock, playing on xbox 1
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By UBERS1LKROAD on 26 Feb 2021 16:37
Doesn’t work I’ve been trying to get this for hours. Glitched achievement.
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By Scenic Route 16 on 15 May 2022 05:03
Kept getting cops at the dealership so i just took a bus from the strip, got the bomb from packie, blocked a bridge with the bus and got it first try with the bomb and 2 rpg shots
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By JayCubz on 11 Oct 2022 22:16
I just packed 10 motorcycles and a car in a little crowd in the dealership and shot the whole thing 3 or 4 times with the RPG and didn't get it (The car was to one side or the pile up, I was to the other, so the car didn't block the impact or anything). On a previous try, I parked 12 or so cars in a gas station and blew the pump up and didn't get it. This achievement is really buggy. There's no way that one video of the guy on the awning firing rockets into natural traffic in Star Junction took less than ten seconds, but mine didn't. Everything blows up instantaneously.
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By jaganshihieiyyh on 22 May 2009 15:35
I tried many times packing 10 cars in parking lot and blowing them up with an RPG. I didn't get the achievement maybe because I used cheats.
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By madmax1698 on 14 Apr 2012 21:14
Works like a charm, the link is dead but I found a alt if anyone needs it
http://snapmap.wikigta.org/index.php?map=IV&title=Westdy...,122
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By JGSLab on 22 Sep 2013 13:31
View all 39 comments Show less comments
since the video at the top has been removed i found one that has a guide
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2 Comments
this was the easiest way that worked for. hardest part was landing te helicopter in the right place.

*wait for the right time of day so there are enough cars. thanks for vid
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By ROD720 on 22 Apr 2013 12:57
thanks man i dit it on my first try
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By iTz x Richard x on 27 Jul 2013 23:29
1-There's a motorcycle dealership in north Alderny. Break the glass with any car and push all the motorcycles into the corner. Leave the car in the corner as well

2-Get outside and jack another car. Park this in the corner as well along with the car and the 8 bikes.

3-Throw a grenade or two into the corner. One should do it but two should guarantee that all of them blow up if you do it fast enough.

4-In case the achievement didn't pop up, just run outside and shoot a car with a rocket launcher.


***Notes***
-If you get on a motorcycle to move it, you will get a one star wanted level

-At the very instant the grenade/s explodes, you should get this achievement. If it doesn't pop up, shoot a car outside with a rocket launcher RIGHT AWAY. Don't wait because you're not sure if you got the achievement or not.

The video below shows another way of how to get the achievement. Very straightforward, credit for the video goes to YouTube user "TrexiZ"
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03 Mar 2010 18:18

2 Comments
This is kinda what i did. Got it 2nd time.
Do not jump on the bikes. Cops always come. I just grouped them together with a car and the park a car either side of the group of 8 bikes. 2 grenades. And boom! Achievement.

So if ypu are havin trouble go with davidriospawn idea. Worked for me.
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By Mike United 007 on 11 Sep 2010 06:53
woked perfect fr me,ty matey =]
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By Adz j74 on 03 Dec 2010 18:27
This achievement just got a lot easier since the release of The Ballad of Gay Tony.

When you get access to sticky bombs call up Armando and buy 8 (or more) of them from his van. Go to a high traffic area (such as Star Junction) and stack at least 10 cars, but the more the better, since things can tend to go a bit wrong.

Place a sticky bomb on every vehicle (up to a maximum of 8), blow them up and be ready to take out a couple of vehicles with the RPG if the bombs haven't done the job.

The reason you should only place 8 bombs is because this amount is the most you can trigger at once, placing more will not do anything except being a waste of potential explosive fun ;) I do not guarantee, that you can't trigger more than 8 bombs at a time, but that is the highest amount I have been able to trigger at once.
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30 Oct 2009 22:44

Linking video
http://au.youtube.com/watch?v=pRytpG3Wiwg
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23 Aug 2008 00:39

Step one: Forget the bombs from Packie ... forget the motorcycle shop ... way too weak for this job.

Step two: Creating a traffic jam like in other videos works well but not so much in that particular area near your second safe house. Try taking a bus into the tunnels from Algonquin to Alderney and about midway through them park it sideways. Force people from their cars by pointing your gun at them (don't shoot), get in the vacant cars and herd them together.

Step three: Rockets/grenades away. If you unlocked the lower wanted level through dating Kiki you can get rid of your wanted level.
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16 Jun 2009 01:12

Here is a solution i made for this achievement!
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I done this on Lost & The Damned because you get pipe bombs and they are much more powerful, so just steal a load of cars and get them all close to each other (You obviously need at least ten) once you have got the cars together keep throwing pipe bombs into the group of cars until you get the achievement.
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16 Aug 2009 10:22

i had no luck with any of these solutions (although thought the bike shop was surely a winner). my method was to:

1. get a taxi over to the safehouse in middle park east (furthest right, middle island).

2. run away from the safehouse to the road just below.

3. block one of the lanes with two cars parked at an angle (use the remove wanted cheat to avoid the police attention).

4. wait until more than ten cars (i had 12+ on my first go)

5. throw grenades (start with the furthest away) as the cars closest to you will drive towards you to avoid the explosion drop a couple at your feet to end the carnage.

bing, achievement unlocked.
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10 Jul 2009 21:25

You need a rocket launcher for this one, and up to four rockets. As long as you've got that, this achievement is easy.

You also need to be somewhere you can line 10 cars up, side-to-side and really close together (for example, the car park just down the road from your eastern-most safehouse in Algonquin).

So get any 10 cars, and line them up, side-by-side and so they're literally touching the car next to them. If you get a wanted level whilst collecting the cars, you can use the wanted level down cheat and it will NOT affect you getting the achievement.

Once the 10 cars are lined up, get out your rocket launcher. Fire at one of the cars on the end of the cars you've lined up (it doesn't matter if you go left to right or right to left). As well as blowing up the car you fire at, it should also cause the next 3 or 4 cars to explode as well. Fire at the next car which hasn't blown up, and so on. A few seconds later, you will have the achievement.
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31 Dec 2009 21:17

Here is the motocycle dealer method FOUND BY ME when the game was released. It was the first video on the web for this method.
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13 Feb 2011 20:59

Easy Method:

Needed: Rockets and a Helicopter

Fly to Algonquin. Go to the busy streets in the middle of the city( where the split in the city is). Find a corner building that is a few stories( floors) off the ground and land.

Wait for cars to line up behind the stop signs when its in red.( Look at both intersections for nicely lined cars)

Pull the rockets out and shoot at the lined cars at both intersections.

Hoep im not stealing this from anyone hear but I did see someone do this on a youtube video last year and helped me get it.

Keep on gaming.
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19 Sep 2009 14:05

[This solution was written for use with the DLC - The Ballad Of Gay Tony. Reason: Sticky Bombs.]

I originally tried using a helicopter to land on an overhang in star junction and rain rockets from there - after about four tries i gave up. It's incredible how frequently the RPG will arc 90* right under a vehicle and scream off up the road.

I finally used a combination of Bjaelde's sticky bomb idea and Roosterteeth's Star Junction bus blockade to get the job done. Block star junction with a nearby bus (I managed to get four lanes cut off with one bus) and calmly stroll between the cars dropping sticky bombs with RT (Pressing RT without LT held in results in the bomb being dropped to the floor) until you've got the place nicely carpetted. If the drivers start getting antsy, don't panic, just wait patiently for more to drive up. This is why we stuck the floor, not the cars.

Keeping the scene in your view (I'm paranoid about the cleanup fairies stealing my cars) back away from the junction until you're safe.

Detonate the bombs, whip out the RPG, and clean up anything that's still moving/not exploding. I had to fire one rocket after the main detonation to get my blip.*

*Of course, I still recommend emptying the RPG into anything nearby.

Good luck ^_~
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07 May 2010 14:53

I got this in front of my safehouse in Algonquin. I chose to do it there because a lot of cars pass through there. First, I went to the gun shop and bought some RPG's. Then I parked a car on both sides of the street in front of the safehouse. Then I just waited there because cars can't pass due to the two cars I parked in the way. Then, I waited until I could count around 15 cars piled up. Finally, from a distance I shot my RPG around 2-3 times and I got the achievement. This was pretty easy and I got it on my first try. Good luck!!!
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01 Jul 2010 18:28

The easist way to do this is to get some RPG's, Get a bus from star junction. and drive it on to the broker bridge. Then wedge the bus across both lanes and wait untill you have about 15 cars. Get out and get on top of the bus. Release Hell with the RPG's and you should get it.

Hint: aim for the back cars first. Beacuse the minute they see you blowing stuff up they try to drive off.
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05 May 2010 20:32

Here's what I did to get the achievement.

1st - Get plenty of grenades (5 should do)
2nd - Go to the airport parking lot and find an area with a lot of cars.
3rd - You can move other cars towards each other and basically make a group of 10 cars(or more to be safe)
4th - Throw all the grenades towards different cars in the group.
5th - Repeat if necessary.
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31 Oct 2010 22:26

i played the balled of gay tony what i did was gather a bunch of cars and park them close together and then take an RPG and then spawn a apc a little bit far away from all the cars climb on top of the apc to get a good view then shoot rockets at the cars
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This is quite easy.. Go to one of the Gas tanks and get 10 cars (Or more just to make sure). Place them around this gastank and trough a grenade or use a rocket launcher and blow it all up. Bang!
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You need an AK-47 and an RPG

The way i did this was to find a building parking lot (like the one outside the airport) and take at least 12 cars and line them up in squares (you should get 3 squares) after that, you throw a grenade in the middle of 1 and shoot an RPG in the middle of another one. both should destroy and you just need to shoot another RPG in the middle of the last square


then u here BLEEP and the achievement pops-up
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I tried a few of the above, but none seemed to work for me. In the end I got this just outside the 2nd safehouse you get. Store 2 cars in your parking area, then get something big (fire truck is good), and park it across the street, across the traffic flow.
Now, go into your safehouse and save. Come out and all should still be there. Go directly across the street and into the doorway opposite (where the street preacher stands, next to the ATM/cash machine).
Go up to the top of the building, onto the roof, then boost up onto the lip. Look down and wait for enough waiting vehicles (only need 7 as you have 3, but they build from the right quickly).
When you've enough sat waiting behind the fire truck, let rip with either grenades or RPGs to suit!

OR, another way. Head north from this safehouse, and get onto the bridge across to 2nd island (Algonquin). Go about 1/4 along, then turn around and go back. Often, the game will spawn multiple cars parked up on both sides of the road to the right at the (Bohan) end of the bridge (San Quentin Ave). If they don't appear, rinse & repeat until they do. Then, block road in middle of parked cars, step back and wait for traffic, then let fly again with grenades or RPG.

I tried both in the space of 5 minutes, and both worked first time.

Hope this helps you. If you vote down, please leave feedback as to why - always looking to improve any solutions I write!
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05 Sep 2011 20:30

easily done after one of the assassination assignments at the plant/rifinery southern part of acter industrial park.

after i completed the assignment, i jumped into a SUV and noticed a parking lot of 30 cars/trucks all parked next to each other in 3 rows so i just pushed the 3 rows together(took about 20 seconds) then i threw 2 grenades and switched to my rocket launcher but the achv popped before i could shoot the rocket launcher.

i only pushed 20 of the 30 cars/trucks together so i wasnt wasting time. achv popped in 2 seconds after i threw the second grenade. the SUV i used for pushing the vehicles together was kept away from the explosion so i had something to drive away and it was a good thing i did, bcuz the cops showed up after the achv popped but they r slow getting there so it was easy to escape.
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19 Aug 2012 19:08

I did this one by acident , on the mission Going Deep on the dlc TBoGt Bulgarian gives you 10 Bombs even if you dont have any ,before i put the bomb on the target car i put around other veichles to kill enemies more quickly when they apeard i blow the bombs i got the chevo
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30 Jun 2013 21:14

EASIEST WAY:

The Ballad Of Gay Tony,

Call up Armando with the gun van, Buy Sticky Bombs.

Go To The Car Dealership Or Motorcycle Dealership, Place Sticky Bombs On Every Vehicle But Use 1 Bomb Per Vehicle.

After 11 Bombs Are Plced On Parked Cars Plus The Odd One Driving Past,

Press And Hold The Down D Pad Button For A Big Bang And The Achievement Easily
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22 Jul 2013 03:37

Works great on TBOGT. Make sure that you have 20 sticky bombs(in case you mess up), and some Rocket or Grenade Launchers. Go to the car shop in Alderny, add 3 more cars/bikes with the rest of parked vehicles, stick every vehicle with a sticky grenade, pull out your Grenade Launcher or Rockets, then detonate the bombs. As soon as the bombs blow up, start firing your Grenade Launcher or Rockets at the cars if the achievement doesn't popped a second after the explosion. Hope this helps for people who still have problems with it.
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15 Nov 2013 12:53

here is the most easy mode to beat that
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24 Dec 2016 00:11

Go to add-ons for the niger take 10 bombs of lipus and 10 cars and a bomb-bomb achievement of your =)
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05 Jan 2012 21:05

1 Comment
We collect 10 cars and blow them up. The easiest way to do this is on island 2, Star Junction. We block the passage with 2 buses, accumulate cars and blow up the RPG.
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By Niksobil on 09 May 2013 20:10
You need: grenades and a rocket launcher.

We go to the parking lot or to the intersection, collect the cars in a pile and blow them up.

Here's a video :

https://www.youtube.com/watch?feature=player_embedded&v=GmyvN6QMphM
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29 Jul 2011 18:55