Here is the full list of all 42 The Solus Project achievements worth 1,000 gamerscore.
Blow up a torch in H2S without getting killed
Phone home
Find Milson
Return to the Crossroad Island with an energy source
Find the energy source
Jump into the Hotspot crater
Drink champagne 3 times
Reach the island of Hotspot
Show some love to rocks - smash 20 rocks together
Enter the massive ice cavern
Enter the Ice Path
Have 16 rocks in inventory
Collect all secrets
Complete Highpoint
Fall for at least 5 seconds to your death
Reach the island of Highpoint
Dip your head in acid water
Open 50 boxes
Complete the library
Carry 10 pieces of Tower Pieces in your inventory
Collect 75 secrets
Get hit by lightning while holding a hammer
Complete Flashpoint
Collect 50 secrets
Reach the island of Flashpoint
Have seen the dolls that cannot be unseen
Overcome the dark encounter
Only eat alien 10 times in a row
Start the Communication Tower
Find and pick up the music player
Get hit by a spike plant
Teleport 10 times in 30 seconds
Find the ladder down
Extinguish a torch in water
Survive a tornado
Complete your survival training
Explore the backside of the first island
Swim far off shore
Collect your first secret
Hasn't picked up PDA until 5 minutes has passed
Set foot on the planet
Return to the first caves after Flashpoint