Cataclysm Dark Days Ahead. It has been fun. Mostly it just takes a bit of JSON but the Cpp is not hard to play with either, just time consuming to read in.
Playing Sky Island mostly at the moment. I kinda want to see how complex I can make the island now. I've modded my own stuff just to make the zombie spawns more like the regular game instead of crazy uber hordes. The default base zombie, in the default group of Sky Island is set to 2000 with the rest in 10's to 100's weight scaling. The base DDA game default is 125 weight for the base zombie spawns and 1's scaling along with some delay windows before the horde acquires some stronger versions. Later horde versions are the same base scaling with stronger evolutions. Basically Sky Island creates an order of magnitude more zombies at every location. Tuning those figures back to more normal levels makes it a more enjoyable survival base builder with fresh environments and experiences so far.
I watched all of Unicorn's SI uploads over the last few days and have basically made the fixes for some of his complaints. I created a rock smasher and had to figure out how the pickaxe works to give it the same large rock to small rocks trait. I also made a makeshift spear strap that can be crafted earlier.
I'm debating trying to make sprites for them too. My main hold up is that I made a roof access door that works with the skylight frame and the step ladder, but I'm still struggling to find a way to open and close the thing from below in a way that makes sense to me. I really want to modify the CPP for doors, but that is too ambitious for a first PR and I'm getting in too deep without some guidance. I really wish the devs did not use the black hole of proprietary Discord or VSC for that matter but I guess going it alone and with Emacs is character building. It has gotten me to rewrite my main bash script to parse code better, so that proved useful. Who knows, I may run out of steam first, or just keep my mods to myself, but I'm having fun playing with the game while playing it.