Slay the Spire 2 has officially launched into Early Access giving us a taste of the latest deck-builder that can be played solo or online with up to 4 players. It launches with Native Linux support, and it's playable on the Steam Deck although Valve have yet to give it a rating.
You can see the launch trailer below:

Direct Link
They're currently estimating 1-2 years of Early Access to add in more overall content, a proper ending, various game modes, fancier visual effects and more languages. So even though it's here now, there's a lot more planned to come for the game.
It's not just exciting because it's a sequel to one of the best deck-builders ever, it's also because this one is built with open source as it's using Godot. And this really could turn into one of the biggest if the original is anything to go by. I do expect this to be quite the hit and early indicators are quite amazing with it seeing a 110,927 concurrent player peak at time of publishing.
Since Bungie's Marathon also released at the same time, together they seemed to really break the Steam checkout for a while but it seems to have calmed down now thankfully. It took me nearly an hour to get the checkout to actually work.

Pictured - Slay the Spire 2 on Linux
The Linux version as far as I can tell is running very nicely though.
Note: if you own the first game on Steam, you can get the sequel cheaper as part of the Slay the Spire Collection Bundle. A nice feature of Steam is that it will tell you at checkout if there's a bundle that makes it cheaper.




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