GZDoom

GZDoom, the latest version 4.13.1, is a 3D-accelerated Doom source port that's based on ZDoom, brilliantly coded and maintained by the developers at zdoom.org. This utility in the games category offers advanced hardware OpenGL and enhanced software rendering capabilities, making it a versatile tool for both single-player and multiplayer experiences.

One of the standout features of GZDoom is its ability to merge your Doom IWADs (like Doom, Doom 2, Final Doom, and Master Levels) into a single IWAD, letting players switch between games seamlessly without relaunching. This enhances the functionality compared to its sister port, QZDoom, which serves as a test bed for new stable features.

The program file names, Doom.exe, and gzdoom.exe, are essential for launching game sessions. Weighing in at a modest 9 MB, GZDoom is lightweight yet packed with powerful features such as support for higher resolutions, improved and expanded textures, free look (look up/down), and translucent objects. Despite being just an engine, requiring original files from the games, it's undeniably one of the most efficient ways to elevate the Doom gaming experience.

GZDoom is optimized to function smoothly on Windows 7, 10, and 11, bringing modern capabilities to a classic game. Previous versions of this program, such as 3.2, laid the groundwork for the robust functionalities present in version 4.13.1. Whether planning to embark on a new single-player campaign or jump into a multiplayer game with seven other players, GZDoom offers unparalleled performance and flexibility.

Pros:

• Free to download and use.
• Integrates multiple Doom IWADs for seamless game switching.
• Supports modern hardware acceleration and enhanced rendering.
• Lightweight at just 9 MB.

Cons:

• Requires original game files to run.
• Primarily serves as an engine, not a standalone game.

For anyone looking to download a feature-rich and advanced Doom source port, GZDoom stands out for its extensive improvements and reliable performance.

You may want to check out more software, such as GZ3Doom, which might be similar to GZDoom.