It is. It was on sale on the Humble Store, and I got a buddy's code to get an even steeper discount. I didn't want to buy it earlier because Early Access, but it's had a lot of good updates since then and my concern was misplaced this time. It's fun solo and it's fun with friends. I've only had it for about a month and I've already sunk 50 hours into it. Plus it runs via proton flawlessly, and the modding tools only require a couple small tweaks to get running.