R.E.P.O. × Portal: a portal gun, see-through portals and a Companion Cube on every haul
A R.E.P.O. × Portal mashup. Every haul starts with one Aperture Science Handheld Portal Device in the truck. Whoever carries it shoots a blue and an orange portal; players, loot, carts and monsters go through and keep their speed.
Rebuilt for R.E.P.O.'s current version (its move to Unity 6).
E fires blue and right mouse fires orange, where you look.R.E.P.O.'s own lobbies, up to six players.
Join through the game: the host starts a game from the main menu, picks a save, and presses Invite in the lobby; friends accept the Steam invite, or use Join Game on the host in Steam. Everyone needs R.E.P.O., Portal and this mashup from Melty.
Portal and everything in it is Valve's: the mod reads it from your own copy of Portal and ships none of it. R.E.P.O. is semiwork's. Originally made by Beck; this version keeps the same features and code, updated to run on the current game. The mod's own code is MIT licensed.