Oberth.io is a free multiplayer space game you play in your browser. Fly through a gravity arena, use planets to bend your path, slingshot for speed, collect energy and ram other players to destroy them. Matches last five minutes and up to 100 pilots can play at once. No download and no account needed.
Move your mouse to aim, hold the left mouse button to thrust, and press space to boost. On touch devices, drag to steer and use the on-screen boost button. Fly close to a planet to have your trajectory bent by its gravity — exit the flyby at the right angle and you gain speed: a slingshot, the game's namesake Oberth maneuver.
Energy is health and fuel: collect glowing orbs to grow and heal. Bigger pilots hit harder but turn slower — a small, fast pilot can still slingshot through and destroy a giant. When the Gravity Storm warning appears, fly inward or burn up. See the full how-to-play guide for controls, scoring, and strategy.