Mewgenics will have 'at least two' DLCs, and the 'small' one is almost a third as big as the base game
I had a pleasant surprise recently when I noticed that my purchase of the hit song Eatin Rats! came bundled with a massive tactical roguelike named Mewgenics. It's pretty good! A tiny bit like XCOM but instead of an alien mothership you're defending against the sentient contents of Edmund McMillen's litterbox. It's also massive.
According to the wiki, there are over 1000 abilities for your mutant mogs to try out. Even just the few dozen I've seen so far are all joyously grotty or absurd...