The Co-Op Collection 2 Add-on for Tom Clancy's Ghost Recon Advanced Warfighter 2 has 8 achievements worth 125 gamerscore.
Kill 6 or more enemies with a pistol in a single match on a GRAW 2: CC map with 5+ players.
Kill 3 enemies as flag carrier in a GRAW 2: Co-op Collection CTF match. Minimum 5 players.
Complete Co-op Campaign Mission without failing an objective, no respawns, on default or hard
Survive 10 mins, killing at least 3 enemies in that time, on a GRAW 2: CC map. Minimum 5 players.