Lab Rat is a free endless runner that plays in the browser, on a phone (swipe or tap) or a computer (arrow keys). Each gate has three doors and one rule, and the doors use real cognitive psychology effects to trick you: the Stroop effect, the flanker effect, the Simon effect, switch costs, the attentional blink and change blindness. When one catches you, the crash screen names the effect and the study behind it, like Stroop (1935) or Eriksen and Eriksen (1974). It is a game, not a psychological test. No account or download needed.
Swipe left or right, or tap a side, to pick one of three doors. On a computer use the arrow keys. Follow the gate rule and do not let the trick pull you to the wrong door.
Lab Rat was submitted to SlowDen by Under the Behavior. SlowDen did not make this game - it is published here from the developer's own submission, added on 2026-11-12. It runs in the browser with no download, no install and no sign-up.