Vera Visions has just released TWTest, a technology and gameplay preview for The Wastes 1.3. The update has been in development since 2019 and seen some delays. Now you can see it for yourself.
Included are 5 maps and most game modes available in the full game - with the addition to single player demos showcasing the built-in editor and mission player.
You can find all the details on how to play here:
Aliens vs Predator
Duke Nukem 3D
Jedi Knight II
Quake III Arena