By skyforbes Battleforge was a unique RTS free to play MMO by EA. As weird and potentially not good as it sounds the game was actually phenomenal in so many ways. It had PvE Co-op content and a strong PvP formula.
Four different factions and then combos between those two factions (they were all colours coded a bit like Magic the Gathering).
It was a cool baseless RTS where you captured control points which gave you points to then summon more units (units were represented by cards and you also had spells and towers).
It was honestly such a good concept all around I'm both surprised and saddened that no one had made an attempt at a speitual sucessor.