Mysterious Gypsy Seer in Dark Room with Candlelight in Ultima IV 1987

FlatOut: Ultimate Carnage. Hardmod - a mod that significantly increases the game's difficulty for special connoisseurs. In addition to the AI controlling faster and heavier cars than the player, it also removes the original wall-riding physics and makes it like in FlatOut 2.

Halo: GoldSource is a mod for Half-Life that recreates the atmosphere and gameplay style of Halo, including Slayer and Firefight modes, iconic weapons and maps from the original shooter, but runs on the GoldSrc engine.

They Hunger: Relit is a remake of the They Hunger trilogy that preserves the original maps but completely updates lighting, shadows, weapons, monster behavior mechanics, and adds new quality-of-life improvements (auto-saves, subtitles, Infection Rate system).

Mental Omega is arguably the best mod for Yuri's Revenge and one of the most ambitious fan projects overall. It not only completely reimagines the original game but also significantly expands it, transforming it into an almost full-fledged sequel with a new storyline, campaigns, factions, and a massive amount of content.

Yuri's Revenge: CnCD2K is a major mod for Yuri's Revenge that adds dozens of new units and buildings, a new faction (GLA) and subfactions for all existing sides, as well as new campaigns and reworked missions.