The Catacombs are ready, including a playable Skeleton Archer character, a bunch of new items, weapons, special rooms, etc. I did a lot of changes to the game to allow playing with undead, so I will need to test it for a while before releasing to make sure there are no serious bugs.
If you want to try the newest version, I have uploaded it to steam into Beta mode. To switch to the beta version, right-click the game name in your Steam library and select Properties option from the menu:
Then click the BETAS tab at the top of the Properties window. Select the "testing - Unstable" option from the dropdown menu:
Enter the password: minimum89012
Steam would then download the files that are different and let you run the beta. If you plan to play online multiplayer - both players have to have the beta version (there will be some periods in-between releases where beta version could co-op with stable version, but this is not guaranteed).
If you decide to go back from beta to stable just open the Properties again and select "opt out" from the dropdown menu in the BETAS tab.
In this version, the Skeleton Archer is fully playable, without needed to unlock him (for easier testing). I plan to run this testing version for a week or two before the official release. In the meantime, I'll probably make the quest as well and then the Skeleton Archer will be locked until you complete it.