The Way Home: Pixel Roguelike

lots of ads for the other areas but the game itself is lots of fun

Very cute demo, able to be played offline without any ads. Once you finish the demo you hit a wall to buy the full game. Alternatively you are presented with the option to pay the price via ad revenue. It's a lot of ads (90 for me if I remember correctly) but the game is very upfront about it and treats it rather fairly. Ad progress is saved so you don't need to do it in one session. 10/10 execution, more games should have this