GC is a no-go for a lot of games in general, just because the periodic stop-the-world cleanup causes unpredictable frame-rate-destroying performance hits. That

GC is a no-go for a lot of games in general, just because the periodic stop-the-world cleanup causes unpredictable frame-rate-destroying performance hits. That doesn't matter a lot for some games, but it tends to stutter things like FPSs unacceptably.