The most appropriately named game ever. I always manage to get some achievements, then I come accross a door, but think to myself "Oh, I'm not far from the achievment for ----". Amazingly I never actually got annoyed, or fed up with the game, as I would with other games, I couldn't tell you why that is though.
 "Tower of Greed"){kind=icon}
 "Frontier"){kind=icon}
 "CycloManiacs"){kind=icon}
 "Gravitee 2"){kind=icon}