In this page you can find a detailed description of "Action Hero" achievement that you can unlock in Get Even. You get this trophy for eliminating all bandits in the main hideout room in less than 30 seconds.
You can get this trophy during "Rose and Jasper" memory that is reserved to Black. This level takes place in kidnappers' hideout. To be more precise, it is the part of the level in which you must find two fragments of Rose Atkins' ID.
One of them is located on the highest floor of the building and you can reach that place by using stairs. The picture presents the corridor that leads to the room with enemies.
30 seconds is plenty enough for you to complete this achievement but despite of that it is a good idea to plan your moves. Try to sneak into the room with enemies and wait for the first bandit to get near the entrance. Approach him from behind and perform a silent elimination.
You can follow the path that the eliminated enemy used and reach the next two enemies or you can find the anomaly presented in the picture. Scanning it reveals a small passage through which you can squeeze.
Regardless of which path you chose you must get closer to the next two bandits. The best way to eliminate them is to use a fire arm. Try to kill at least one of them with a headshot (you can help yourself with thermal vision). If you can't eliminate the second enemy in the same way then you must quickly shoot at him a few times so he can die before the time limit (30 seconds) runs out. The time starts running when you enter the room with the bandits.