Geo-Mod 2.0 was an engine developed for Red Faction: Guerrilla and upgraded to "Geo-Mod 2.5" for Red Faction: Armageddon.
The engine was originally developed under the name "RED," and has little in common with the original Geo-Mod concept. In Geo-Mod 2.0 level border geometry ("walls" and the "ground") cannot be modified, the engine instead focusing on ragdoll physics simulation with a stress-based collapse model for buildings. In Guerrilla and Armageddon most building geometry is destructable (though not certain large or important structures) and buildings will react in real-time to damage, eventually toppling over if enough structural support is
Video[]
Red Faction geomod
Geo-Mod 1.0 presentation
Red Faction Guerrilla - Geo-Mod 2.0
Geo-Mod 2.0 in action