Area Size (Diablo II)

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Area Size, meaning how big places actually are, is a tricky concept to understand. Different areas in Diablo II are generated through different means. Without knwoing how map generating works in Diablo II, it becomes very hard to do any assumptions based on anything but what feels bigger. There is however a lot to know on the subject.

There are three kinds of maps in Diablo II: Overworld, mazes and presets.

  • Overworld areas are, just as the name suggests, everything randomly above ground (that is not a preset). Blood Moor, Lost City and the Plains of Despair all belong in this category.
  • Mazes are, also as the name suggests, randomly generated dungeon. Any dungeon that changes appearance belongs here along with a few others, like Travincal.
  • Presets. These are defined levels. A preset never changes, but several presets can exist for the same purpose. Tristram is a preset, as are the different areas of the Chaos Sanctuary.

Map Basics

Maps in Diablo II are stored in in what are called .ds1 files. These files are then combined together to form the areas of the game. In some cases this is very easy, as is the case with presets. That is because presets are made of just a single .ds1, and figuring out the size is simply a matter of seeing how large that file is.

Mazes are a little harder to figure out. Mazes are built out of different rooms created by Blizzard. Each room thus works just like a preset, and the size of each room can be seen by just looking at the .ds1. These rooms are then randomly assembled by the game to create the famous random dungeons of Diablo II.

Overworld maps are the most complicated. Determining how big an overworld area actually is is qutie hard, because it is not at all as structured and easy to understand as maze generation.

Theoretically, a map can easily be compared to any other simply by comparing the number of tiles used on each map. In practice however, comparing different kinds of areas (overworld to preset) is very hard, and getting exact comparisons nigh impossible. Rough estimates can be made however.


Presets are the most simple forms of maps. They always look the same and don't have any random elements to them. All presets are saved as a single map file with set dimensions, therefore it's relatively easy to compare them amongst each other. Note however that the dimensions are for the box surrounding the map. An example of this is Tal Rasha's Chamber, the size listed includes the black unused tiles on the sides of the corridor.

Here's a list of all preset levels in the game:

Act Area Size Variations
I Rogue Encampment 2,240 4
I Cave Level 2 576 1
I Underground Passage Level 2 576 1
I Hole Level 2 576 1
I Pit Level 2 576 1
I Forgotten Tower 64 1
I Tower Cellar Level 5 900 2
I Monastery Gate 1,152 1
I Outer Cloister 2,240 3
I Inner Cloister 360 1
I Cathedral 952 1
I Catacombs Level 4 682 1
I Tristram 2,064 1
II Lut Gholein 3,136 2
II Harem 304 1
II Tal Rasha's Chamber 1,504 1
III Kurast Docks 3072 1
III Swampy Pit Level 3 1,600 6
III Flayer Dungeon Level 3 1,600 6
III Kurast Sewers Level 2 396 1
III Ruined Temple 576 3
III Disused Fane 576 2
III Forgotten Reliquary 576 2
III Forgotten Temple 576 2
III Ruined Fane 576 2
III Disused Reliquary 576 2
III Durance of Hate Level 3 1,189 1
IV Pandemonium Fortress 768 1
V Harrogath 1,600 1
V Halls of Vaught 7,056 4
V Throne of Destruction 2,080 1
V The Worldstone Chamber 3,025 1
V Nihlathak's Temple 594 1
V Arreat Summit 560 1