GDM 2026 is a Warhammer 40,000 mission-planning and game-tracking resource focused on the game’s 11th edition. It brings key information for setting up and playing missions together in one place, helping players prepare matchups and follow scoring throughout a game. Visitors can browse five primary mission decks: Take and Hold, Purge the Foe, Reconnaissance, Priority Assets and Disruption.

The site also provides attacker and defender secondary mission decks for scoring additional victory points. Force disposition cards help determine which primary mission deck is in play, while recommended terrain layouts are organized for each force disposition matchup. A mission matrix lets players cross-reference their own disposition with an opponent’s to identify each player’s primary mission.

GDM 2026 also offers the free Warhammer 40,000 Core Rules, tournament rules and faction detachments with their Detachment Points costs. Its game tracker supports round-by-round victory point tracking for both players, with games saved automatically to the user’s on-device history