Few Games

  (Edited: )

diablo:hellfire (diablo will always be great, player mod made it better. requires a bit of setup to run correct though)

Metroid prime series (I think Sean would enjoy it, great music and environments)

Boarderlands 2 (he could bring JP in for some laughs)

magika (another one to do with JP)

Left for Dead 2 (because you can't go wrong with killing zombies, could be alone or with JP)

Deus Ex:Human Revolution (pretty fun stealth ARPG)