Any group team-building activity used by middle-managers in corporate America to pacify and relieve tension among their underlings. Reindeer games typically involve taking a beloved childhood game and butchering it by making the activity company specific. Ironically, reindeer games rarely have the desired effect, as the employees are most often annoyed or, in some cases enraged, by their forced participation.
Bill: So Phil, did you finish that project yet?
Phil: No, I had to go down to corporate HQ yesterday for some fucking reindeer games. God, my boss is a stupid cunt.