The Elder Scrolls Online DRM

Well its an mmorpg that requires a login, so I'm assuming it uses something else too. Not positive since I don't play it.

It has its own launcher that gets updates and whatnot like most MMOs on Steam.

Source: I bought the game outside of Steam.

Honestly your better off buying OFF steam, as you can only buy crown packs on steam if you buy it on steam, and only one pack for each domination a week.

if you buy it off steam you can buy as many crowns as you want as often as you want... (crowns being the in game cash shop currency.)

Or you can wait til they inevitably make the game free.