When you complete an area, you will unlock it’s special character and special weapon for use in the rest of the game. The arenas are split in 3 different difficulty levels: easy, medium and hard. When you complete the 4 default arenas in each section, you will unlock the last arena in that section. You will unlock the very last level when you have completed all other levels. There are a total of 18 characters and 15 levels. Chaos Faction has 29 different weapons, which randomly appear during play in crates. To pick up a weapon, just run into it. There are 6 different powerups which randomly appear during play. Become the last man standing in the arena.