apparently it might be some kind of Arena mode. In the DLL files, there’s convars for tf_arena_
One to set a class change limit, and one to force users to a random class each spawn.
tf_arena_max_teamsize
tf_arena_required_teamsize
tf_arena_preround_time
tf_arena_round_time
tf_arena_force_class
tf_arena_change_limit
Arena would explain how they managed to spit out 5 maps I guess.