Minetest | Open source voxel game engine
To note, this is not actually a game, but a platform which happens to provide similar features to Minecraft out of the box. Running the app. will give you a prompt to select a game from their content database (which includes at least three different projects that aim to be an open-source, community-driven variant of Minecraft, Mineclone 2, its fork Mineclonia, and Mesacraft).
Another option, you download the vanilla game and ‘build your own Minecraft’ with the hundreds of mods that are available. You may need to learn the Lua to tie them together smartly, but it gives you full control.
About those games I mentioned though, Minecraft itself has been getting a lot of discontent among the playerbase because of a constant stream of controversial changes (user feedback does not matter at all in most cases) as well as EULA changes that are really tightening the screws on what people are allowed to do.
To top it off, there has been widespread reports of the company cracking down on mods and removing access points for devs. in favor of an online store (where creators on contract make paid mods for Microsoft). The games I mentioned by nature cannot prevent modding and cannot prevent itself from being forked if the dev. team does similar controversial moves (for instance Mineclonia is a fork of MineClone and is quickly gaining in popularity).
It also runs quite fast as well, if you can run Blender Eevee (legacy, not next), then you can turn all of the graphics settings up as well (to note, graphics had a huge boost in the last year). There is also the usual advantage of having no DRM and no online store to install, just plug and play, and have fun.
To note, I am not surprised if the FOSS ecosystem for games is about to get a boost, as too many are now feeling burned by paid titles even if they start out good (ie. the game is great at first, but then gets plagued by bad updates). It does not hurt to give it a chance.