Alien Breed 3D 2 Mod Featuring Sci-Fi Combat in Doom II

OpenRA is an open-source engine that recreates classic RTS games from the Command & Conquer series and Dune 2000. It rewrites the original engine from scratch, supports modern operating systems, online multiplayer, improved graphics and modifications, but requires the original game files for full functionality.

Tiberian Revenge: Kane's Root Canal Mod Base is a mod for Yuri's Revenge that ports Tiberian Sun and Firestorm to a modern engine with Ares and Phobos support. Allows playing campaigns, skirmishes, and multiplayer while staying true to the original and serving as a convenient base for creating mods in the Tiberian Sun universe.

Smooth Doom is a visual mod for Doom and Doom II based on GZDoom that makes weapon, monster, and item animations noticeably smoother by adding numerous new frames while maintaining fidelity to the original gameplay.

Contra is one of the oldest and most popular mods for C&C: Generals Zero Hour. It adds new generals, numerous units, buildings and abilities, improves graphics and AI, introduces a rank system, new maps, sounds and much more, making the game deeper and more diverse while preserving the spirit of the original.

Vinifera is a project designed to improve the C&C: Tiberian Sun engine. It adds sidebar interface tabs, production queues for shipyards, support for new types of tiberium, aircraft carriers and missile carriers, enhanced queue mechanics, improved unit selection, new animations and much more.