Doom II: Hell On Earth Foursite v.3

Description
High concept 4-in-1 singleplayer map for Doom 2. Four miniature maps connected by a single hub corridor, each with its own theme and playstyle. Built in vanilla Doom 2 over 13 months, this is a labor of love for those who relish the classic Doom 2 experience. No advanced source-port features or enhancements, except pushing the Doom 2 map format to its limits
The overall design for the map is a simple one: four wedge-shaped mini-maps, each with its own visual style and assortment of enemies. Each of these four �quadrants' also ends with a kind of boss-room - some are environmental, some are enemy based, some are a combination of the two. Beyond each boss-room is a switch that opens the door to the next quadrant. Once all four quadrants are complete, the final boss room is opened and can be accessed to complete the level."
To run this mod use GZDoom.