Four-Corners is an official skirmish map from Supreme Commander. Each landmass has just seven mass deposits. On the plus side each land side is very easy to defend thanks to the small size of the islands and the predictable avenues of attack. The small size of the map implies naval domination with prodigious air support is enough to win the game. Aeon have the big advantage with their hovering tanks but the other factions are not completely outclassed provided they can secure their island from harassment.