Search and Rescue is a gametype in Redacted OPS that came in the Horizon DLC/Title Update that involves two teams and multiple rounds and only one life per round. When a player is killed they are "stunned" and have to be revived by a teammate by going to them and healing. If a entire team is "stunned" they lose the round. To prevent players from being revived, if the map has death traps, pitfalls, or space sections you can knock the downed players in them and kill them off permanently for the rest of that round in particular.