ReSizE is a single-player puzzle game set in the mysterious C.T.O.D. Laboratories, where completing workouts earns gummy bears. The premise gives its tests a playful frame: each level asks players to defeat a training drone, but the game restricts the available weapon to changing the size of objects.
That enlarge-and-reduce ability drives the puzzles. Players must work out how manipulating objects can help them take down the drone and finish the workout, making spatial problem-solving central to the action. The listed design includes challenging, unusual puzzles and original music; the protagonist is voiced by the same actor as Gordon Freeman. The store description also gives a broad estimate of six to fifteen hours of gameplay across more than thirty levels.
Because ReSizE is designed for one player, its format is focused on an individual working through these puzzle encounters rather than coordinating with others.