Show HUD Info - whether to show HUD info for players looking at this breakable. This is not affected by mp_allowmonsterinfo and sp_allowmonsterinfo cvars.
Explosive Only - make the breakable immune to any non-explosive damage.
Op4Mortar only - make the breakable resistant to anything besides op4mortar shells.
Not solid - make breakable non-solid (can be destroyed only with trigger).
Smoke trails on gibs - add gray particle trails on gibs (using the default effect from the engine).