F.E.A.R. 2: Project Origin
59 Achievements
10-12h
Flash Dance
Kill 3 players while blinded from a shock grenade during any ranked match.
0.7%
How to unlock the Flash Dance achievement in F.E.A.R. 2: Project Origin - Definitive Guide
Once you're all set up like in the video, don't copy the way they throw the grenade you can have one enemy hold the to cook the grenade and it will blind everybody, at that point shoot the rocket launcher- twice if necessary to kill all three enemies.
Credit for video goes to 'TheMETLheads' of YouTube.
UNATTAINABLE due to server shutdown.
Everyone in your Boosting group should add shock grenades (denoted by the lighting bolt) to their loadout. Set up a 4-player Deathmatch on the Conduit map. On this map there is a large room with a missile launcher in it. Have the other three players stand in the corner while you stand a safe distance away with the missile launcher aimed at them. One of the three players should then toss a shock grenade, making sure that it lands within your sight. As soon as you are blinded by it, fire the missile launcher. You need to have killed three players before your vision returns for the Trophy to pop. It is possible for you to throw a shock grenade at your feet yourself but I found it difficult to aim the launcher when blind.
This one can be tricky because shock grenades don't always work correctly, sometimes the grenades will do nothing and sometimes they will stun instead of blind. If this happens, you just need to try again.
See the Boosting Manifesto for information on how to stack this trophy with others: LINK