If you haven't watched them before, I would really recommend checking out their Playlist of games played. If you've heard of JonTron or Egoraptor, but you haven't heard from them in a while, check out their show!
Portal 2: Orange and Blue - PART 1 - Game Grumps (via GameGrumps)
And if you haven't heard of JonTron or Egoraptor (neither of them are on Wikipedia), go look up their channels! Them's some good stuffs in there!