Tall.io

Tall.io ties competitive standing directly to height rather than score or kills, collecting matching-color bricks stacks your stickman taller, and a taller stickman can knock over anything shorter, which makes every brick grabbed both progress and a direct threat to smaller rivals.

Because height determines who wins a collision, avoiding taller stickmen entirely while actively hunting shorter ones tends to grow your own height faster and more safely than contesting every encounter. Gates that match your brick color are worth routing toward deliberately, since running through the wrong-colored gate wastes a height opportunity rather than building on it. Paper.io 2 runs a similar grow-by-collecting risk tension with territory painting instead of stacking height.