trigger_gravity not working in Alien Swarm

I want to add a space sequence to my Alien Swarm map using a trigger_gravity, unfortunately it doesn’t work. Neither the players nor physics objects are affected (yes I’ve set the proper flags).

Does this work at all or am I doing something wrong?

I got it working now using a trigger_vphysics_motion

Unfortunately only physics objects are affected, not the players/aliens or any gibs.

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