Rescue me (or: first aid game) is a game for larger groups.
You don't need any equipment, but it would be great if you had some music available.
The participants are split into three groups (or more). Each group chooses a number.
The groups move around the room (if available, you can play music to support that). The players may move freely, they don't have to stay together as groups (actually, they shouldn't).
Then, (the music stops and) the referee calls out one of the names of the groups. All member of that group then slowly start to "faint" and collapse. The player of the other group have to catch the collapsing players and safely lay them down on the floor (possibly in the "recovery position").
If you want to have some kind of judgment, you can award points for each rescued player (or negative points for each player not rescued).