There are two modes.
0: Negative accel only. Slide will persist as long as you do not release all keys or turn against your momentum.
1: Positive accel for a brief moment which transitions into negative accel. Slide will cancel if you move less than normal crouch speed or you turn against your momentum.
Slide sound is currently footsteps. A new sound (four, actually) is needed.
There are two modes. 0: Negative accel only. Slide will persist as long as you do not release all keys or turn against your momentum. 1: Positive accel for a brief moment which transitions into negative accel. Slide will cancel if you move less than normal crouch speed or you turn against your momentum.
Slide sound is currently footsteps. A new sound (four, actually) is needed.