[i]Darkest Dungeon[/i] and [i]Spore[/i]. [i]Darkest Dungeon[/i] is excellent, one of the highest quality games I've ever played, and I really admire the developers' devotion to their artistic vision. Unfortunately, while I love basically everything about the game, it's just difficult enough, and just rogue-like enough, that I'm probably never going to finish it. I pretty much just play through a couple of dungeons every now and again. In fact, you can probably add any roguelike to my list of "favourite games I'll never finish." [i]Spore[/i] is a little trickier to explain. It's a very flawed game, that I have a lot of issues with. But it also has a lot of really interesting ideas, and is probably still the most unique game I've ever played. If EA weren't a bunch of scumbags, we might have seen the creator's intended sequel, and everything would be better. Anyway, I usually get to [i]Spore[/i]'s space stage (the place the game really begins) and then quit. It's the best part of the game, but it's also very difficult and pretty exhausting. So while I start out enjoying it, eventually the entire universe hates me and then the game is a lost cause.