Item Spawners - Different item spawners each with their own gameplay use.

trigger_trap - trigger_hurt with custom death messages and ownership rules.

ge_gameplayinfo - entity which can be used to access game information like playercount, and trigger outputs on game events like the start of a round.

func_ge_door - func_door with extensive modifications for a more dynamic and faithful gameplay experience.

func_ge_brush - func_brush with custom collision groups and the ability to remove touching entities.