Contra is a modification for Command and Conquer Generals: Zero Hour real-time strategy game. It's a big project that started in 2004. It adds many new units as well as numerous new upgrades, new general's powers, buildings and new generals.
Project Raptor: The Foxtrot Code - This is the future of modes with three times the level of monetary concept - a step in acquiring new technologies and capabilities.
Rise Of The Reds is an expansion mod for Generals: Zero Hour which adds the Russian Federation as a fully independent faction in addition to making extensive additions to the old factions USA, China and GLA.
This mod adds some great new gameplay to the game. Virtually everything has been tweaked and modified. Around 80 new units and 20+ new structures have been added in combination with new generals, super weapons and powers.
C&C:VRM for Generals strives to make Zero Hour as visually realistic as possible. The developers are not interested in changing the gameplay in any way, and intend to keep the original balance of Zero Hour as intact as possible.