Achievements
Complete each of the following achievements below to get the allotted gamerscore
UnlockableHow to unlock10x Multiplier 25Get the multiplier to x10 in Single Player10x Multiplier Twins 20Both players get their multiplier to x10 in Multiplayer2x Multiplier 5Get the multiplier to x2 in Single PlayerAll Beastie Combos 30Get all the Beastie Combos by shooting a certain amount of each of the special beastiesBeastie Combo 5Get a Beastie Combo by shooting a certain amount of only 1 type of beastieBlack Belt Grandmaster 35Complete all 16 levels on Black Belt in Single PlayerEmpire Level 1 5Complete Level 1 on any difficultyEmpire World 1 10Complete World 1 on any difficultyEmpire World 2 10Complete World 2 on any difficultyEmpire World 3 15Complete World 3 on any difficultyEmpire World 4 20Complete World 4 on any difficultyMillionaire Twins 20Both players get a million points each in Multiplayer