Supreme Commander is available with different terrains. All maps are downloadable here.

You can either download the Map Pack or select a single map:

Map Pack

(2) Winter Duel

(3) Sludge

(4) Arctic Refuge

(4) Blasted Rock

(4) Paradise

(4) Vya-3

(6) White Fire

(8) Burial Mounds

(8) Clutch

(8) Ians Cross

(8) Icy Oasis

The current version of the game engine is v21, all of this maps are based on that engine.