Return to Perdition mod for Quake 2

25 years after mankind attacked and defeated the Strogg homeworld, contact with a research outpost fell. A group of 8 Marines is sent to check what happened. The soldiers' dropships are shot down and the player finds himself alone on a hostile world.
The Strogg are back and raided the outpost!
It turns out that 25 years ago, mankind stole the Strogg's slipgate technology and experimented with it at the research outpost. The Strogg want to open a gate to another dimension, plunder it and thus return to old strength.
But this really goes wrong ...

You will have to have the full registered version of Quake installed to play this pack. The Return doesn't contain any assets from Quake.

My goal is to bring back that feeling of the good old late 90s FPS.
I was inspired by canceled & alpha/beta games like:
HACX2
Prax War
Duke Nukem Forever (1998)
Amen The Awakening
Prey (1998)
Daikatana (1997)
Unreal (Alpha)
DOOM 4 (canceled)
Alien Breed Conflict
In The Shadows
The Y-Project
...