Amanra is the rebel leader, the Enslaver (player 1) is the enemy. Player 3 (green) is your allie, but you're the only one playing (player 2). This is my first REAL single player scenario, that I devoted my time to. Its not the best, but its definitely worth your time. It has a good stoyline, good battles, and the ultiamte ending that you will need the first 3 episodes to see. This is Episode 1, so read the damn text in the cinematics if you don't wanna get confused like people online do sometimes.
Of all 3 of 4 episodes so far, I recommend episode 3 the most. But, play this while you're waiting for the others.