Oh,Balls! Physics extends classic Oh,Balls! gameplay with a fun new twist: Players of this fretta gamemode use exclusively the gravgun, crowbar, and grenades to fight in a physics arena on one of the classic Half-Life 2 Deathmatch maps. The added strategy involved with using physical objects to fight over physical goals turns an already fast, fun, and frenetic gamemode into a frenzied melee of epic proportions.