The world is safe at the moment ( 10 )
Complete the game once.
True Heroes (25)
Survive for 5 minutes in survival mode.
The Fast Track (20 )
Finish the game in three hours or less.
A la Carte (20 )
Finish a level without collecting objects of health or energy .
Keymaker ( 20 )
Collect all the key cards .
Playing with all options ( 15 )
Unlock all alien forms beating levels 1-10.
No injuries (10 )
Pass the level of your choice without damage .
Training a hero (10 )
Destroy 50 enemies .
The marathon of a hero (15 )
Destroy 300 enemies .
No time to lose (20 )
View a time on the rankings at all levels.
Versatility ( 15 )
Destroy the last boss using each of the aliens to inflict the coup de grace.
All the superpowers ( 20 )
Collect all the superpowers and the extension of health .
