Kidou Senshi Gundam: Gihren no Yabou: Zeon no Keifu: Kouryaku Shireisho is a tactical strategy game for PlayStation that builds upon the gameplay mechanics of Gihren's Greed. Players engage in diplomatic actions such as ceasefires and treaties while managing a customizable military force. It features an enhanced map system and introduces mobile suits and characters from multiple Gundam OVAs, alongside new factions including Titan, A.E.U.G, and Axis.
Blood of Zeon features a more complex political system compared to the original Gihren's Greed. The player can now create ceasefires and treaties, and the military system now supports mobile suit upgrading and customization. The map system was also updated. Blood of Zeon also introduces mobile suits and characters from various Gundam OVAs, along with the third-party factions Titan, A.E.U.G, and the Axis.