The fascinating thing about this open-world game is that unlike most of the other entries on this list — which have goals that are easy to understand if hard to achieve — Minecraft has no compulsory goals at all beyond survival. Sure, you can play through to the game's final boss (the "Ender Dragon"), but really, the gaming experience is entirely what you make it. The result is kind of like socially acceptable Lego for an entire generation: You can spend hours building something, anything, you want. And then suddenly it's 4 a.m. and you have to work tomorrow. Crap.