We've updated Paint the Town Red to 0.11.0 which has the first version of the Beneath cooperative multiplayer. 2, 3 or 4 players can now play through the entirety of Beneath together.
As is typical with large updates like this, there's a high probability that there are bugs we don't know about. If you encounter any new issues, particularly with the Beneath multiplayer, please post them in the appropriate Bugs section on our Steam forum or the Paint the Town Red Discord (https://discord.gg/9vug3Tb). We have a number of known issues to fix which we'll continue working on. There will be small updates over the coming days and weeks as these are completed. If there are any new bugs that prevent you from doing things you could do before, please let us know about it and while you wait for a fix you can tell Steam to use the previous build of the game by selected the 'previousversion' option in the 'BETAS' tab in the game's properties in your Steam library. One thing to note about the Beneath multiplayer is that you have 3 separate multiplayer specific save slots you can choose from when hosting a game. If you want to continue playing with friends over multiple sessions and continue making progress, the same player will need to host the game each time as the progress will only be saved on the host's computer. The 3 different save slots can be used to have separate progress with different friends. Singleplayer and multiplayer saves and progress are kept separate.

Changelist

• Added 2-4 player cooperative multiplayer to Beneath
• Dead players can now spectate other living players from a 3rd person perspective
• Many improvements to general multiplayer gameplay and audio
• Fixed a bug where bodyparts on enemies that couldn't be knocked down could get in "stuck" state from traps
• Fixed a bug with Bore Worm and Abberation tentacle animations
• Level Editor: Fixed a bug with scales resetting on grouped objects
• Many other untracked fixes and improvements