This PC-exclusive modification, released on February 5, 2025, is a fan-made project for the classic shooter, Doom II: Hell on Earth. It features a collection of 36 maps, developed under specific design constraints. The gameplay is centered around navigating these maps, which are built on a 64-unit grid, with a rule that all 256 lines within each map must be positioned at 90-degree angles to one another. This structural limitation, coupled with a distinctive purple hue-shifted color palette, defines the modification's unique aesthetic and gameplay foundation.

Core Experience and Design Philosophy

The modification originated from a collaborative speedmapping event, emphasizing rapid yet structured level design. Players can expect a series of distinct environments, divided into four thematic episodes: castle, space, flesh, and jungle. Each map showcases the creative application of the imposed design rules, offering a focused challenge for players familiar with the original Doom engine's capabilities.

What are the unique features of this modification?

The defining characteristic of this modification is its adherence to a strict 64-grid layout and the 90-degree angle rule for all map lines. This constraint fosters a particular style of level architecture, emphasizing geometric precision and spatial awareness. The visual presentation is further distinguished by a unique purple hue-shifted color palette, creating a consistent and atmospheric visual identity across all 36 maps.

Gameplay and Content

As a shooter mod, the fundamental gameplay loop involves navigating these intricately designed levels, engaging with enemies, and progressing through each stage. The 36 maps are organized into four distinct episodes, providing a varied experience in terms of setting and potentially enemy encounters. The focus is on the execution of the design principles within the familiar shooter mechanics of its parent game.

Map Structure and Themes

Episode Breakdown

The 36 maps are segmented into four distinct episodes, each offering a different thematic setting:

Castle
Space
Flesh
Jungle

Design Constraints

The development process adhered to specific technical and artistic limitations:

Grid System: All maps are built on a 64-unit grid.
Line Angles: Every line segment within the maps is set at a 90-degree angle relative to adjacent lines.
Color Palette: A purple hue-shifted palette is utilized throughout the modification.