
Paper.io is a competitive multiplayer game where you expand your territory by drawing shapes and closing loops while defending your trail from other online opponents.
This skill-based action game challenges you to claim as much space as possible on a shared board. You control a moving square that leaves a trail behind it, and your primary goal is to return to your established territory to secure new ground. The mechanic is simple yet demanding, requiring precise movement and spatial awareness to grow your influence without leaving yourself vulnerable.
The multiplayer environment adds a layer of constant risk, as other players can eliminate you by crossing your trail before you complete a loop. It appeals to fans of the .io genre who enjoy quick sessions and territorial strategy. Success depends on balancing aggressive expansion with careful defense to maintain your position on the leaderboard.

Use the arrow keys to guide your character across the board. Move outside your current color to create a trail and return to your base to capture that area. Watch out for other players; if they touch your trail while you are outside your territory, your run ends. Similarly, you can eliminate opponents by hitting their trails while they are expanding.