How to buy additional copies of a Diablo game with a Battle.net account that already owns the game

Lord of Destruction is an expansion and requires that Diablo II is purchased first

What to do if you're missing the cosmetics from Diablo IV season 3.

What to do if you are unable to install Diablo I

Troubleshooting chat issues in D2R

Information on muted CD keys.

Information on Undercoin status at the beginning of The War Within Season 2

Information about the mechanics of dying in Diablo II or Diablo II: Resurrected

Information on why your purchase may not have been discounted.

Information on error BLZBNTAGT0000083F