You're a archer (toxote) and you have 1 hp and 1 attack. You go around and kill the enemy team (they can re-spawn). Every time you kill someone you get gold. Upgrades around the map give you a choice to upgrade your archer (toxote). Random Events occur. Some are completely random, you'll get gold sometimes, more god powers, maybe you'll even die.
But the MAIN IDEA is to Capture the enemies flag (pig/goat), that's how you win.