Here is the full list of all 28 PIXELMAN achievements.
Eat 200 fried chickens in total
Rescue 2000 Citizens
You've destroyed 3 buildings in a row!
I'm starting to think you're doing this on purpose
Complete Arcade Mode on Easy Difficulty
Survive a fly through the asteroid field without taking any damage
Go between 200 rockets
Unlock all podiums
Rescue 100 girls in total using Pixelgirl
Hit by lasers for more than 20 seconds in total
Hit by rockets 10 times in one gameplay
Cross 10 entire tunnels in the dark in total
Pass through 100 trees
You've destroyed a building!
You've rescued 40 citizens in a row in one gameplay
Take down 10 enemy planes using Powerups
You've heard the PIXELMAN theme 4 times in one gameplay
Cross an entire tunnel in the dark
Go between 50 rockets
Survive for 5 minutes in one gameplay
You've made more than 9000 points in one game
Unlock Endless Spacestation Mode
Hit by two bombs from the same plane... and survive!
You've reached 2000 points without being hit by anything in one gameplay
Unlock Endless City Mode
Unlock your first podium
Complete Arcade Mode on Medium Difficulty
Complete Arcade Mode on Hard Difficulty