Batman: Arkham Origins

This one is a little tricky as it is both luck and skill based. I personally think it is harder to silently take down 4 other players without dying.
I used an explosive gel on the central objective and waited for someone to perform an invert take down on and right after I did one of the thugs got taken out by my gel so I jumped down and took out two recently spawned thugs from behind.
Dont forget to scramble their goggles with your scrambler before you attempt silent take downs. You could also use your sonic batarangs to help you take them out quicker. Good luck and have fun!

Easy. Only needs 3 people . Go to Chemical . Meet at middle secure point . Batman place ice gel down. Joker and bane meet up together. Stand on ice . Once they are knocked out. Batman resprays same location. When joker and bane meet up at same location . Pop

All of the online achievements in this game can be done in Private Matches. The multiplayer side of the game is on Disc 2 of the Retail copy of the game. No downloading or installation is required.

This achievement can be done either in the Invisible Predator Online game mode or the Hunter, Hunted game mode.

Lobby Setup

For this achievement you will need at least 5+ players including yourself. If you have dummy accounts, that might be a recommendation to ease the congestion.

Whoever is the host needs to go into "Create Private Game" from the Main Menu and make sure Mode is Inv Pred Online (Invisible Predator Online) or Hunter, Hunted and the recommended map is Chemical Plant. Keep "Map Rotation" Off and then click "Start Game".

Here you need to use your and invite your group into the game until it is full with the people. Once you have enough people you can start the match. If anyone get's disconnected during the match, the match will continue but they cannot return to the game as invites will be disabled.

Boosting Method

You can easily work on this achievement the same time as...



You will have to either be Batman or Robin. If you have less players within the group only one of you will spawn as Batman whilst the rest will either be on the Joker Team or the Bane Team. If you have 6+ people then one of you will spawn as Robin as well as Batman, giving 2 people the opportunity to go for the achievement.

For this achievement you will need to all meet up somewhere on the map and get at least 4 people within the Joker/Bane Teams to squeeze within each other like a sponge. The Hero will then go nearby and then equip the Explosive Gel by pressing . They then need to hold down the button and then press to place the Gel on the ground.
When everyone is nearby and in position, the Hero needs to step back and then hold down the button again. When ready press the button to detontate. The Gel will explode and if done correctly the explosion should kill at least 4 opponents, giving you the achievement. If you didn't get it, you've got less than 40 seconds to take down some opponents in getting credit towards the achievement before the counter resets.

There are other attacks Batman & Robin can do in the game without meleeing but this is known to be the easiest.

Credit towards my friend tornprince2012, there is a method that can be applied of you want to have certain people on certain teams before your match loads up. This applies throughout the multiplayer of the game.

From the main menu, if you go to "Options" and then select "Game Options" you should be given the option to choose your "Faction Preference". Originally it says None, but you can change this to either "Joker" or "Bane" so that you have a high chance in joining either of the two teams you wish to be on. If you are wanting to be "Batman/Robin", simply keep this as None and choose "Hero Opt-Out" as "No". Get everyone else to choose "Yes" and this will give you a high chance in becoming "Batman/Robin" for the round you are playing on. However even though you have chosen these team members doesn't 100% guarantee you will be on that team. In addition at the end of the round, people can still "Opt Out" & "Opt In" if they want to become "Batman/Robin".

Good Luck!

I managed to get this on the Blackgate Prison level (shock...), without initially setting out to get it.

As Batman I grappled onto one of the vantage points and waited for the inevitable rush from the Elites to capture the central zone. Once the Bane team got there I waited for the gunfight between the Bane elites in the central zone and the other gang emerging from the tunnel.

I launched a Sonic Batarang into the central zone, which exploded and took out two Bane Elites at once. I think the fact they were engaged in the firefight distracted them from the bleeping of the Sonic Batarang.

Once they were KO'd I realised I had a chance to get this achievement - and now that the central zone Bane Elites were down, the Joker Elites started advancing out of the tunnel. Quickly I grappled over to the vantage point directly above the tunnel entrance and did an inverted takedown on one of the thugs.

3 down, 1 to go.

Then, fortunately, the remaining Bane thug was wandering about on his own down by the lower tunnels to the side of the map, so I drop attacked him and followed it up with a ground takedown, popping the achievement.

The key is to get that double takedown at the start, either with Explosive Gel or the Sonic Batarang: That starts the timer for getting two more takedowns within 40 seconds.

Played Inv. Pred Online on Wayne Chemicals Plant. Put Explosive Gel near Objective B, managed to get a double kill fairly quickly, then hit a Silent Takedown & a Grate Takedown on members of the opposite team, Achievement popped.

A lot of luck is involved in this, but the more you play, the better your chances at getting it. I was overall rank 20 before I finally earned the Achievement.

I got extremely lucky, and it isn't a guaruntee that opponents will cooperate, but this is how I got it. When I was selected I chose wonder city as the map. Wait until the super villain is being called out. The door the game chose is is in a little alcove. There is only one entrance to it and there is a vantage point directly above it. Sit there and when the people run to inevitably open the door, button mash y for inverted takedown, I took out 5 guys in 20 seconds doing this. Mohsen has a good strategy too. Good note is that the achievement pops after the last takedown. So if after your fourth guy, the achievement doesn't pop, keep hastily taking others down and hopefully one of them will get it for you. Last note: I can confirm it must also be one life. I got a triple knock out with an explosive gel, immediately died after, respond and inverted a guy on my spawn platform and it did not pop.. So just a heads up