Add game type to comment

[eniklas]

If a game is listed as an MMO in IGDB, we could add that as a comment. Other game modes could be handled similarly (see types in contants.py), but not sure they'd be useful.

[eniklas]

Showing if a game is offline only could be useful, as that generally means we'd need Hamachi (if offline means LAN play) or remote play (if it means local play only).