Risk of Rain is a side-scrolling action platformer built around survival on a mysterious planet. Each attempt draws on randomly selected stages, enemies, and bosses, so the route and threats can vary between runs. Its permanent-death premise makes every expedition consequential: players try to reach the teleporter home before a defeat ends the run.
The game ties danger to elapsed in-game time. As the clock advances, difficulty rises, giving exploration and combat a persistent sense of urgency. Along the way, players can collect from a pool of more than 100 items, gain experience, and develop a character into a stronger fighter. There are 12 unlockable characters, as well as drones that can offer support such as healing or missile attacks. Levels also contain shrines and chests, while achievements unlock additional items and characters.
Runs can be played solo or with friends in online co-op, and the listed modes also include local multiplayer and shared-screen play. Whatever the group size, the central rhythm remains a race to adapt, fight through changing encounters, and find the way off the planet.