In celebration of Diablo 4's 30th anniversary, Steam has added it to its typical Free Weekend promotion early, while also confirming yet another freebie. It's worth noting that it's uncertain if Diablo 4 is the only Steam Free Weekend-style promotion through September 21 or if more will be added as usual on Thursday. The anniversary celebration might make Diablo 4 the complete focus, so Steam users will just have to…
