So im trying to get some sound effect to be activated when you're sliding, but i cannot find am option in the state sensor that says "sliding", and when i try to use the impact sensor it won't activate if i have set it to no touching, and when i set it to touching, then it also activates when you are hitting any part of the slide, even the parts where you're not sliding.

I even tried to put a movement sensor on in and out speed to see if the player is moving out, but it won't register in/out speed when you are sliding. Anyone know of a solution?

I also miss that sensor.
Unfortunately, i didnt find any way around to solve the problem.
As for my part, i needed it for the stairway logic.
In the end i used plenty in/out moved material pieces with a collision tag for the advanced up mover.
It is not the best solution since every stair contains two pieces.
Bottom piece with the up-tag and upper with no tag.
(to prevent uncontrolled jumping)

If it is only on the slide, maybe you could place a tag or impact sensor on the slide itself, and use that to trigger your logic.