Full list of all 11 Alien Zombie Megadeath trophies - 5 bronze, 5 silver and 1 gold.
Complete the introduction training level.
Unlock one of the extra Spacesuits.
Unlock 20 levels.
Get a combined total score of 3 million on all levels.
Unlock the UFO upgrade.
Unlock all the levels.
Score 2 milion on any single level.
Unlock all of the extra Spacesuits.
Get a combined total score of 30 million on all levels.
Complete all the adventure levels. The blue ones!
Easy! Collect all the medals.