Here is the full list of all 23 Pegasus: Broken Wings achievements.
Received a strange call
Escaped the gangs pursuit
Fled the apartment raid
Broke into the Prison Facility
Completed the game (and watched a post-credit scene)
As Edan, experienced all romantic scenes with Aleira
As Edan, experienced all romantic scenes with Ilana
As Edan, experienced all romantic scenes with Cassana
As Edan, experienced all romantic scenes with Tero
As Edan, experienced all romantic scenes with Ethyra
As Ethyra, developed a romantic connection with Mirika
As Ethyra, developed a romantic connection with Nenad
Gathered and released full evidence against PCP and the Council
Successfully escaped the heat while on an airbike
Edan got arrested
Edan saved by Tero
Prison escaped with no more than 2 K.Oed guards
Developed trust with Brunnel
Convinced an enemy to shoot himself
Successfully defended the hideout
Lured and took down the soldiers with a shock stick
Saved Nenad
Completed the game with Suspicion rating of 2 or less