Bethesda, since... Well, that's just what they do. Followed closely by Rockstar. Although I think GTA could be significantly improved with more dungeons and Indiana Jones "archaeology". Who's with me?
Although I'd probably go with Mojäng (correct spelling is correct), if that was an option... Or possibly Dwarf Fortress.
Although I'd probably go with Mojäng (correct spelling is correct), if that was an option... Or possibly Dwarf Fortress.