Grand Theft Auto IV

Grand Theft Auto IV

65 Achievements

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Under The Radar

Under The Radar

You flew under all the main bridges in the game.

How to unlock the Under The Radar achievement in Grand Theft Auto IV - Definitive Guide

map of the locations
External image
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17 Jan 2009 03:03

10 Comments
Awesome map... 9 down, 5 to go... Alderney is not open to me yet (learned that the hard way, but at least I got my "One Man Army" (after "Paper Trail").
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By Onza on 15 Apr 2009 05:34
well done
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By Straight Blazen on 05 Aug 2009 02:37
Thanks have 1 left to go but couldn't find it. I think the reason why is due to the #14 thing on the map. I'll have to try that and see if it works.
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By DeafAtheist on 27 Sep 2009 19:33
Map was fantastic. Thanks!
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By Bikuchu on 14 Feb 2011 06:16
Here is a bigger map guys :

http://lulzimg.com/i15/c17eb0.jpg

but thanks for the info.
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By Syberpr0 on 21 Mar 2011 16:47
Nice video...helped Big Time!!!
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By D1v1dedL1nes on 04 Jan 2012 16:05
Very good job on the video. Ik it's annoying when the trophy symbols go off the map. A way to improvise would be to pause the game after flying under a bridge, then setting a waypoint w/ the next trophy.
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By TommyGavin99 on 11 Feb 2012 01:39
Hey guys, I did checked the stats and it’s still good because It doesn’t count to 100% on both of them in 5 Helicopter Tours and 14 Bridges to get two achievements is Sightseer and Under The Radar.
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By Brett Evans15 on 18 Apr 2020 20:11
Thanks for linking to the video above 👆 - this was a great guide to where all the locations were (and as someone else mentioned, you can call 359-555-0100 to spawn a helicopter at your location. Just be careful to spawn it in an open-ish space like a large intersection!)
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By JGXenite on 31 Dec 2022 03:16
Here's an HD video that has a map at the beginning since the map from the OP isn't available anymore: https://www.youtube.com/watch?v=Xva1icdUf20

Also you can earn this as soon as after the second mission of the campaign (because your phone isn’t fully unlocked until after that mission). Spawning in helicopters doesn’t void the achivement
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By The S bot 9000 on 26 Jan 2021 05:08
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Not sure if it's solution but it might help.

If you flew under all 14 bridges and the achievement didn't pop out then it's possible you didn't fly right under the first bridge (from the sea) in Alderney’s industrial park. It counts if you flew under it right from smokestack. First I flew the bridge under the water and it didn't count.

External image

External image
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30 Apr 2012 11:22

9 Comments
good final tip to go to the rhs on the chimney flying due East thanks.
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By StanBowles22 on 26 Nov 2012 03:55
Thanks for this, it was my last one.
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By SpeciallyTDerp on 18 Jan 2013 20:32
Worked for me as well.
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By DopamineLoop on 22 Jan 2013 18:47
yea i just noticed this glitched when i went through above the water. went through a dif part then my chievo popped
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By JamesLCC on 27 Jul 2013 15:20
Thanks. I had this issue.
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By Wcbezoeker on 15 Aug 2013 22:45
That was it! Thumbs up!
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By TeeJayKombo on 31 Aug 2013 22:15
Same here. Utterly ridiculous that only one specific part of the bridge counts towards the flyunder total, but there you go.

Thanks for the tip.
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By SledgeHammer jr on 19 Oct 2013 16:41
Fuck this cheevo! But I got it thanks to you.
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By Killerfox Uru on 23 Sep 2015 03:11
Great solution. I ran into the same problem.
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By Ethigy on 20 May 2018 05:04
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To obtain this achievement you need to fly under all 15 main bridges in liberty city. So you must go through all of liberty city bridges and when go under the right bridge on your top left corner there will be a text saying "14 more under the radar bridges or something like that. Good Luck! P.S I do have this achievement
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02 Jul 2010 23:09

you can spawn an annihilator 359-555-0100, keep activating health cheat 482-555-0100 to prevent the chopper from being shot down. this way you can get the achievement early in the game before you unlock the other islands. use the map as a guide
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11 Oct 2009 14:32

I don't get what all the videos and maps achievements are about. All you need to know is this:

Every time you fly underneath a bridge, you'll see trophy icons appearing on your mini-map. Press start to see the whole map, with trophy icons at the bridges you didn't fly under yet.

You can get to a helicopter as soon as you get to the central island (Algonquin). There's a helicopter tour business on the south side. Also, once you get to the big island, if you have done all Brucie's missions, shortly after getting to Algonquin he'll phone you to ask you on a helicopter ride, you can just do it during that 'mission'.

Another tip: do this while you can't yet officially get to the last island. That way, when you get to those bridges, you'll get a six star wanted level and you can go for the One Man Army achievement. Staying alive for six minutes while you're high up in the air is a piece of cake!

mistress3riple makes a good point on one of the bridges, I made the same mistake. there are four bridges on the left island; the most left of which shouldn't be flown under while you're over the water, but slightly south of this.
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This achievement can be unlocked in either the main story mode or in The Lost and Damned. Go to a heli-pad and hijack a helicopter. You might get a one star wanted level, but it is easily lost. Now, look around for a bridge, shouldn't be too hard. Find one, and fly under it. It you've already flown here, nothing will happen, so find another. If it's a new bridge a notification will appear telling you how many more you need. Now, quickly press start and go to your world map. All around there should be little icons labeled trophy, and appear as such in the icon. Set a course for the nearest one and fly under. Rinse and repeat. There are a few bridges that extremely low to the ground and dangerously close to the water that you might fly by and think, theres no way they want me to fly under that. Well, sorry to say, they do. Don't be discouraged, it's not too hard. Although the penalty is losing health and having to find another helicopter. A little hint I found useful was not to try to fly equally between water and bridge, but rather try to skim across the top of it, this might cause your helicopter to start beeping, but it doesn't mean you're down for the count. Just keep going and you'll be out and done in no time.

Hope this helped.
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25 Mar 2009 22:37

There's a lot of maps and videos floating around on the internet for this trophy, but frankly you shouldn't need any of that. All you need to know is this:

Every time you fly underneath a bridge, you'll see trophy icons appearing on your mini-map. Press start to see the whole map, with trophy icons at the bridges you didn't fly under yet. Just place a marker on the next bridge, fly under it, and repeat.

You can get to a helicopter as soon as you get to the central island (Algonquin). There's a helicopter tour business on the south side. Also, once you get to the big island, if you have done all of Brucie's missions, shortly after getting to Algonquin he'll phone you to ask you on a helicopter ride, you can just do it during that 'mission'. Once he's your friend you can also call him yourself and select 'heli'.

Another tip: Do this while you can't yet officially get to the last island. That way, when you get to those bridges, you'll get a six star wanted level and you can go for the One Man Army trophy. Staying alive for six minutes while you're high up in the air is a piece of cake! Doing this during Brucie's activity has the added benefit of the wanted stars disappearing if you get back to his heli pad afterwards.
Grand Theft Auto IVOne Man ArmyThe One Man Army trophy in Grand Theft Auto IV worth 58 pointsYou survived a 6 star wanted level for a full 5 minutes.


Last tip: There are four bridges on the left island; the most left of which shouldn't be flown under while you're over the water, but slightly south of this, over land. The bridge won't count as being flown under if you're going over the water.
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Text guide :
  • Types of helicopters.
  • Helicopter and bridge location maps.
  • Achievements related to helicopters.
  • Visual photographs of bridges.
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23 Mar 2020 08:12

There are a total of 14 bridges in the game that you need to fly under to get this achievement. After each flight, messages will be displayed on your screen that you have successfully flown under the bridge, as well as how many bridges you still have left.
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29 Jul 2011 19:07

2 Comments
Bridge locations.
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By Grecha on 19 Sep 2012 20:27
You don't have to fly all the bridges on the first try!
I sank the helicopter several times: once or twice I accelerated and fell into the water under the bridge, and once again I was shot down by another helicopter. My character didn’t die, but simply fell into the water while sitting in a helicopter!
Afterwards, I swam ashore and went by taxi to the place of excursion helicopter tours, missing the train in the taxi. While flying in another helicopter, the bridges that I had already flown under were not counted in any way, and when I reached the next one that had not been crossed, I saw a message: “12 left.” After the next failure: “8 left”, etc.

The main thing is not to die between spans under bridges. If you fall into the water, quickly get out of the helicopter, otherwise the character will begin to drown and life will gradually end.
If you failed on one helicopter, feel free to board another and continue with the next one you failed.
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By emporio2866 on 22 Aug 2017 21:36