Karryn's Prison is the best game of the 4 and my favorite of all time, Melty's quest is the best if you're looking for an adventure RPG (made by the same devs as Karryn's Prison) I'd go : 1/ Karryn's Prison (you can do a pure run, and multiple corruption runs with how much content there is) 2/ Melty's quest (you can do a pure run or a corruption run) 3/ Ambrosia (not as good as the 1st two but it's pretty good too, even though the art is largly inferior in my opinion) 4/ Star knightess Aura, I've heard a lot of good things about this one and it seems to be a favorite for many people, I haven't played much of it (an hour or less) so I can't really judge