Half-Life series and crossovers with it...

[Kiza/Raybox]

I've been thinking of making a Half-Life crossover with any franchises/universes where Gordon Freeman visits the world from the other games. We know that Half-Life x Minecraft exists, let's remember the maps that were made to replicate locations from the game (even though partially).
I've been also thinking of making some textures related to Half-Life, but that's the different story

ANYWAY! What Half-Life collab would you like to see or even make once you get free time?