Here are the unearned and earned-by-1 achievements based on scoresheet data I downloaded this morning. :)
Unachieved:
Cannon Specialist
Collateral Damage
Curator
Executioner
Explosive Specialist
Fearless
Gladiator
Hardcore
Inspector Gadget
Look Ma, No Swapping!
MAIN.CPP
Master Trapper
Most Wanted
One Last FU
Partners In Destruction
Perfect Achiever
Pyromaniac
Stunt Win
Superachiever
The Little Core That Could
This Only Looks Like Junk
Unstoppable
Watch This!
Achieved by 1:
404 - Valguris
Desperate Times - Joshua
Exposed - Valguris
Full Golem - Terminus
Grand Amoeba - Pimski
Guerrilla Style - zzxc
I Wish There Was More - GJ
Left-hand Path - Valguris
Minesweeper - Valguris
Super Mutant - Raine
Terminals Are For Geeks - Raine
WMD - Valguris