It's been way too long so I don't remember if offset and power are even relevant when accelstyle is set to 0 but accelstyle 0, power 2 and offset 0 will give you the same curve than in q3. No idea about accelstyle 1.

cl_mouseAccelStyle doesn't exist any more, it was killed some time around 2012.

Right, it's the other 2 parameters that actually do the work or something.

I googled around and apparently ioquake3 has QL accel implemented. I appreciate the replies though.

QL's accel changed at least once over the years so make sure ioq3 has QL's current accel scheme.

accel style still changes, almost any bigger patch brings new experience