Released in 2012 for PC, Fire and Water Booster Pack is a paid expansion for Robot Entertainment's trap-based action-strategy game Orcs Must Die! 2. The pack adds three new campaign levels alongside three additional Endless Mode conversions of existing stages, extending both the main progression and the wave-survival content. Three new traps enter the arsenal — the Web Spinner, Floor Portal, and Dart Spitter — offering fresh options for constructing defensive kill corridors. Two new elemental enemy types introduce additional tactical wrinkles, requiring players to adapt their trap layouts and strategies accordingly. The expansion also introduces a "Trapless" skull award, a challenge modifier that pushes players to clear levels without relying on placed traps, rewarding mastery of the game's melee and ranged combat alongside its signature defensive mechanics.
