Out-of-depth timer

Obsolete: This article refers to an aspect of the game which has been removed. It is retained for historical reference only.

Crawl sometimes generates unusually hard out of depth (OOD) monsters to keep you on your toes. The possibility of out of depth monsters increases the longer you spend on a level (although the overall spawn rate progressively slows after 3,000 turns on that level, stopping altogether at 15,000 turns).

Mechanics

There are "moderate" and "super" out of depth monsters, which spawn at different rates.

• Moderate OODs are up to 5 levels out of depth (favoring lower values). Most floors have a flat 14% chance of moderate OOD fuzz for each monster. The chances of moderate OODs ramps up, reaching 100% after 7800 turns.
• Super OODs are either (2 * floor_level) + 4 or floor_level + 2d(27)/2 - 1 levels out of depth. They can happen after you reach 1400 - (117 * depth) turns. The initial chance is 0.02%. After 3000 turns, the chance increases until reaching 100% at 12000 turns.

The OOD timer does not apply to portal vaults, any 1-level branches, Zot, Pandemonium, Abyss, or any of the Hells. In addition, OODs do not apply for the first 700 turns on D:1, and are applied less often for 584 turns on D:2.

Note that certain vaults can place OODs at level generation. They may place random OODs or have a specific set of monsters (e.g. death yaks on D:8).

See Also

• Monster generation

History

• As of 0.21, monsters no longer spawn over time. Therefore, the out-of-depth timer became obsolete.