Achievements:ACHIEVEMENT – HOW TO UNLOCKEmpire Level 1 (5 points) – Beat Level 1.Empire World 1 (10 points) – Beat World 1.Empire World 2 (10 points) – Beat World 2.Empire World 3 (15 points) – Beat World 3.Empire World 4 (20 points) – Beat World 4.Beastie Combo (5 points) – Get a Beastie Combo by shooting a certain amount of only 1 type of beastie.All Beastie Combos (30 points) – Get all the Beastie Combos by shooting a certain amount of each of the special beasties.2x Multiplier (5 points) – Get the multiplier to x2 in Single-Player.10x Multiplier (25 points) – Get the multiplier to x10 in Single-Player.Millionaire Twins (20 points) – Both players get a million points each in Multiplayer.10x Multiplier Twins (20 points) – Both players get their multiplier to x10 in Multiplayer.Black Belt Grandmaster (35 points) – Beat all 16 levels on Black Belt in Single-Player.