ToME: the Tales of Maj'Eyal

Do this game support online play? i want to play it with my gf, its a dumb question...
i try GOG version from my friend and get hooked, and i want to buy steam version

and do dlc good?
is there like a free random generated map? (well in the campaign i always start on forest) like free roam mode, with no quest and just dungeon crawling like crazy

sorry for dumb question
my grammar is bad haha

There is an online chat, but no multiplayer/co-op play.

Yes, the DLC's are generally regarded as well worth their price.

Yes, there is a rand gen map kind of thing known as the Infinite Dungeon, though it is lacking some features and is far from being ToME's main game mode (also you have to unlock the Infinite Dungeon first, but that can be circumvented).