Diep.io Wiki
Diep.io Wiki
Tale of Diep (ToD) is no longer under active development as a derivative of Diep.io and remains here as an archive, though spin-offs such as The Extended Tale of Diep remain active. For info on the successor to Tale of Diep, now an independent work called "A Tale Where Nothing Matters", visit its Discord server here.
This fanon article won an award!

Fortress Mode is an Arena Gamemode in The Tale of Diep. It is basically 4 Teams bumped up to 11. Created by Zathsu.


Note: There are links here for a reason. If you want any MORE info on anything listed below, PLEASE click on the links. They go into much more detail.

  • There are four teams: Red, Blue, Green, and Purple. Each is in charge of their own Castle. All AI-Controlled enemies are dark gray.
  • A Team can be eliminated from the game by killing it's Team Emperor.
    • This is the main goal of the game, as it ends when one team remains.
    • To encourage players to help their team and not stick in the free space, there are roaming packs of General Enemies, not including Portals or Tears of Panzer.
    • As another way to encourage Team assistance, there is no score, and Polygons do not give XP once you're Level 30. You can only level up beyond that point by killing enemies, other players, and bosses that happen to spawn.
  • The map is way larger than any of the other game modes. Details on where everything is will be here: Fortress Mode Map.
    • This map is too being reworked.


  • Winner of the First Conception Tournament in Game Modes category.
  • In the near future, this will not be the way to access and battle the Archprophet.
    • As of the 2nd day of the Return of Panzer event, now the Archpuppet spawns here. The Archprophet is now fought in the Tower of Gladii game mode.
    • As of December 2017, the game mode now has no links to the story and is instead inside of The Arena, with its mechanics heavily changed.
  • The award's graphic features three Sons of Panzer. (The Pentagun, The Mason, and The Estuary).
    • This now makes no sense due to their current lack of presence in the game mode.
  • The Archprophet himself in the earliest stages of the story was fought at the end of this game mode.