Sized Up vs Trapline

Test your perception and challenge your friends in the ultimate guessing game where size truly matters—how well can you judge the real dimensions of simple objects?

Build a trap course. Prove it can be beaten. Watch strangers try. Trapline is a game about building. Place saws, lasers, crushers, pistons, drones and pendulums on a short course, tune each one, and choose the music and the laugh that plays when someone crashes. Before you can publish, Trapline's solver has to beat your course, so every course in the game is proven possible. Nobody ever meets a trap that cannot be passed. Then other players run it. They flip gravity with a single tap, thread your traps, and have to make it through the door at the end. Every run of your course pays you bolts. BUILD • 21 pieces: traps that kill, hunters that chase, terrain, fields that slow you, speed you up or fight your gravity, and rules like flip locks and gravity wells • Tune every piece: saw size, laser timing, pillar gaps • The solver checks your course as you build and shows you the winning line • Give each course its own music and crash laugh PLAY • One tap flips gravity. That is the whole control. • 90 courses by Trapline in three packs, with stars for beating par • A new daily course every day, with a board and a streak • Boards for the daily and for the week's top builders • Three short lessons to start GROW • Research new pieces, sounds and a bigger bench in the Workshop • Earn bolts every time someone runs your courses • Level up your pieces with cores: your traps get nastier, never your runner stronger FAIR BY DESIGN • Bolts are only ever earned by playing. They are never sold. • Courses are checked by the solver before they are published, and runs are checked by our server, so the boards stay honest. • No ads. No tracking. No account to make: sign in with Game Center, or play under an anonymous handle. Share a course with a link and dare a friend to beat your par.