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YO UP! is a chaotic co-op physics building game where one wrong move can collapse everything. Build unstable towers solo or with friends, climb floating islands, and reach for space... if your tower holds.
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You’ll need teamwork to climb anything at all. Place planks, ladders, bridges and improvised structures to create paths upward, but every addition makes your tower more unstable. Help each other build, or accidentally destroy everything in the process.
Nothing here is stable. Construct your own way forward using physics-based building and climbing mechanics. Every structure bends, sways, and collapses under pressure. One wrong placement can change everything.
Expect the unexpected. Your creations are only as stable as your last placement. Watch entire towers collapse, recover mid-climb, or turn brilliant plans into disasters in seconds.
Progress through floating island layers as you climb higher and higher toward space. Each stage pushes your teamwork, creativity, and patience further than the last.
Play solo or invite up to three friends in online co-op. Work together to build your way up or struggle to survive each other’s “helpful” construction ideas.
Up to 4 player online co-op
Physics-based building and climbing
Fully emergent chaos-driven gameplay
Floating island vertical progression
Character customization
Solo or multiplayer play
Constantly unstable structures
Steam lists the YO UP! release date as 2026.
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