Black Ops 2 Custom Games: Why Achievements Are Disabled

Achievements and Trophies are disabled in Call of Duty: Black Ops 2 Custom Games for several reasons. Mutable rules (adjustable score, time, health, gravity) trivialize requirements, custom lobbies lack secure stat tracking, and enabling achievements would facilitate boosting (e.g., friends letting you kill them for headshots). Earn achievements only in Public Match, League Play, Zombies, or Campaign modes.