Here is the full list of all 39 Hargrave achievements.
Just jump over it, man.
You should avoid this
Get mashed
Experience death
Defeat Cepheus
Defeat Auriga
Defeat Elnath
Defeat Zosma
Defeat Cygnus
Defeat Perseus
Defeat Scorpius
Defeat Eridanus
Defeated Disafter
Complete the game
Collect all power cells
Upgrade a weapon to level two
Upgrade a weapon power to level three
Die one hundred times
Die a lot
Defeat a red block
Pick up your first power cell
There is nothing to see here
Complete the game in under an hour
Complete the game in under thirty minutes
Complete the game in under twenty minutes
Navigate through Grave Sector 1
Defeat Grave Cepheus
Navigate through Grave Sector 2
Defeat Grave Auriga
Navigate through Grave Sector 3
Defeat Grave Elnath
Navigate through Grave Sector 4
Defeat Grave Zosma
Navigate through Grave Sector 5
Defeat Grave Cygnus
Navigate through Grave Sector 6
Defeat Grave Perseus