Complete the first level
Achieve a 10x combo
Kill 6 enemies at once with the 'Explode' ability
Kill 8 enemies at once with the 'Chainkill' ability
Kill 3 enemies at once with the 'Timebomb' ability
Kill 3 enemies at once with the 'Bulletstorm' ability
Complete any level without killing anyone
Gain the maximum time bonus after completing any level
Complete the game
Find all the collectible radios