CASC, or "Content Addressable Storage Container", is a proprietary game archive format developed by Blizzard Entertainment to replace their older MPQ format. The 2014 Warlords of Draenor expansion was the first WoW expansion to support this format.
- Blizzard Entertainment 2014-04-03. Warlords of Draenor™ Alpha Testing Begins. Official World of Warcraft Game Site (US).