Marvel's Guardians of the Galaxy

During any combat encounter in the game, there is a possibility for one of your allies to take enough damage that they go down on one knee and glow red. If playing on the easiest difficulty, this is unlikely to happen against normal enemies but is pretty likely during boss fights. If one goes down, you'll get an on-screen prompt to help them. They will be glowing red. Approach and hold  to heal them, reviving them and unlocking this achievement.