Dungeons of ZZT
DUNGEONS.ZZT, or Dungeons of ZZT, is the third[1][2][3] main world in the ZZT saga, and one of six ZZT worlds created by Tim Sweeney.
The game begins after the player has been thrown into the dungeons by the "evil Dungeon Guards," and the player collect 4 purple keys to unlock the dungeon doors and escape. Curiously, the opening scroll claims that this world contains "45 room," when it only contains 28 boards (including the title). Dungeons is notable for being being completable in under 2 minutes using the pause bug.
Dungeons was a commercial product available for registered users, until 1997 when it was released as freeware.
At least two revisions of Dungeons are known to exist. They came with the following two versions of ZZT:
Between the versions bundled with 3.0 and 3.2, the Potomac Computer Systems branding was removed, an incomplete puzzle board was removed, and an exclamation point was changed to a period on the ending screen.