Nauseous Lite

Nauseous Lite is a client-side mod that changes how the controls respond rather than how the screen looks. Players can reverse the W, A, S and D keys, swap jump, sneak and shift functions, flip the horizontal and vertical look axes independently, and swap left-click attack with right-click use. Tuning these options is meant to disrupt muscle memory instead of adding visual filters, and the enhanced nausea effects can be customized further.

The mod is released under the MIT License, and its source code and issue tracker are public. It is published for Forge and NeoForge across seven release versions, 1.20.1 – 1.21.1, with Forge 1.0.0 for 1.20.6 and NeoForge 2.0.1 for 1.21.1 as the latest files. Only the client needs it, so servers run without installing anything, and the mod works with bows, tridents and food under the interaction swap.