There are 3 available Skirmish modes.
- Classic Mode: Only Tanks, UFOs, Missiles, and base buildings are available. It's just like the arcade.
- Standard Mode: Infantry, air units, defensive structures, and Advanced Tanks are buildable. Maps will not feature garrisonable buildings.
- Advanced Mode: Advanced weaponry allowed, such as Gunships, APCs, and naval forces. Maps will feature garrisonable structures.
Return to the project menu.