Here is the full list of all 38 EXIT 4 - there are Portal achievements.
MINE levels completed
Complete MINE levels in 3 mins
Complete MINE levels travelling no more than 700
Collect all coins on MINE levels (50 points)
Don't lose a single life on MINE leveles
Complete MINE levels using no more than 250 move orders
MOON levels completed
Complete MOON levels in 5 mins
Complete MOON levels travelling no more than 1200
Collect all coins on MOON levels (50 points)
Don't lose a single life on MOON leveles
Complete MOON levels using no more than 400 move orders
HIGH levels completed
Complete HIGH levels in 8 mins
Complete HIGH levels travelling no more than 1400
Collect all coins on HIGH levels (50 points)
Don't lose a single life on HIGH leveles
Complete HIGH levels using no more than 500 move orders
WIRE levels completed
Complete WIRE levels in 8 mins
Complete WIRE levels travelling no more than 1500
Collect all coins on WIRE levels (50 points)
Don't lose a single life on WIRE leveles
Complete WIRE levels using no more than 500 move orders
CUBE levels completed
Complete CUBE levels in 10 mins
Complete CUBE levels travelling no more than 2000
Collect all coins on CUBE levels (50 points)
Don't lose a single life on CUBE levels
Complete CUBE levels using no more than 700 move orders
SURVIVAL levels completed
Complete SURVIVAL levels in 40 mins
Complete SURVIVAL levels travelling no more than 8000
Collect all coins on SURVIVAL levels (300 points)
Don't lose a single life on SURVIVAL leveles
Complete SURVIVAL levels using no more than 2500 move orders
SURVIVAL levels completed on PRO level
Complete all basic maps on PRO level