Here is the full list of all 56 Unavowed achievements. It takes around 25-30 hours to unlock all of the achievements on Windows.
Never ask your friends for a hint
Keep Eli and Mandana together for six missions
Complete the female bartender origin
Head out four times with Eli and Vicki
Complete the male cop origin
Start four missions with Mandana and Logan
A villain escapes her punishment
Calamari for a year!
Complete the female actor origin
Leave commentary mode on for the entire game, from the opening menu to the closing credits.
Free at last
Reach the final confrontation alone
Kevin now has a second chance
Better safe than sorry
Calli returns to her former position
There's a new statue in the North Grove
Well skewered, Mandana
Perhaps it was meant to be this way...
Complete the male bartender origin
The only way to be sure
We'll do it right this time
Reach the final end with your full crew in tow
Finish a jailbreak without getting chided by a ghost
Select Mandana and Vicki four times for missions
Choose Mandana six times for missions
Choose Vicki four times for missions
Embark on three missions with an all female party
There's a new muse in town
Show sympathy for one of nature's creatures
Enter the Eddings house using Vicki
Visit a special location on a certain day
Get to the truth of what happened
Defeat a foe with firsthand knowledge
Food tames the beast
Complete the female cop origin
Resistance is futile
Free of torment at last
Embark on four missions with Eli and Logan
Choose Eli six times for missions
Choose Logan four times for missions
Nice try
A deal has been struck
Disperse the ghost on Wall Street
Finish three missions with an all male party
No muse in Brooklyn tonight...
Free the Brooklyn ghost
No mercy for the trees
Welcome Vicki to the party
Nobody has to die tonight
Needlessly unlock the same door in two different ways
Disperse the Staten Island ghost
Welcome Logan to the party
Enter the Eddings house using Mandana
A new world. A new life.
Why take the risk?
Complete the male actor origin