Limited support
This feature is only present in Portal 2: Community Edition and Portal: Revolution.

joy_response_move

🟦 Executable on Client

joy_response_move <value>

'Movement' stick response mode: 0=Linear, 1=quadratic, 2=cubic, 3=quadratic extreme, 4=power function(i.e., pow(x,1/sensitivity)), 5=two-stage

Note:

The value is saved and will be restored on next startup.