Here would be my solution: Either you don't have headshots, or you make aimbots a part of the game. Publish an API to let users have aimbots. Measure aimbot-nes

Here would be my solution: Either you don't have headshots, or you make aimbots a part of the game. Publish an API to let users have aimbots. Measure aimbot-ness by speed of aim, and have that status effect another stat, like "shield." ("Cranial shield feedback?") Manipulate that curve, such that the penalty only really kicks in for the truly superhuman. Now 1) You've motivated the cheat-writing community to try and imitate very good human players, but no better. 2) Your game's mechanics de-emphasize the style of play that would've made aimbots op, making it just a player choice. Also, not everything has to be an FPS.