Strategic base setup in Command & Conquer Yuri's Revenge Verzov Order mod

EDuke32 is a free, open-source engine and source port for Duke Nukem 3D, based on the Build Engine. It allows running the game and mods on modern systems, adding new renderers, improved graphics, scripting support, and extended editing capabilities.

D3HDP (Doom 3 Essential HD Pack) is a graphics modification for Doom 3, Resurrection of Evil, and The Lost Mission. The pack improves textures, materials, lighting, and effects, fixes maps, and adds HD UI elements. The mod preserves the original gameplay and is fully compatible with the vanilla game and various ports.

Half-Life: Urbicide HD Pack - unofficial HD texture pack for Half-Life: Urbicide mod.

C&C: Brute Force is a mod for Yuri's Revenge that turns the game into a kind of Tower Defense: you start with minimal forces, defend against endless waves of Yuri's minions, find random supplies, and gradually strengthen your base to eventually reach the dictator himself.

In Mute Witness Stand is a mod for Half-Life set during World War I. You play as British soldiers fighting in the trenches against the German army and an army of the dead, raised by experimental chemical weapons.