Contract Rush DX features a 2D world built around run-and-gun combat and platform navigation. The player must choose from a roster of characters to complete missions in hand-drawn environments. The action mixes shooting with exploration, and the cartoonish aesthetic is paired with graphic depictions of blood during combat. The central gameplay loop requires accepting and completing contracts, which progresses deeper into the world's many conflicts. This structure takes the player through a series of focused action scenes.