Here is the full list of all 35 STEINS;GATE: Linear Bounded Phenogram achievements.
Completed everything in STEINS;GATE - Linear Bounded Phenogram.
Cleared "Lunar Bifröst."
Viewed all TIPS.
Viewed all messages.
Unlocked all CGs.
Unlocked a hidden scenario.
Cleared "Abduction Across Three Worlds."
Cleared "The Quantum Awakening."
Unlocked 75% of CGs.
Unlocked a final scenario.
Cleared "Eternal Polaris."
Cleared "Hermaphroditus in the Labyrinth."
Cleared "Ghostly Rendezvous."
Unlocked 50% of CGs.
Cleared "Built with Love."
Unlocked a 3rd stage scenario.
Cleared "Superhero Chat-Noir."
Cleared "Vermillion Soteria."
Unlocked 25% of CGs.
Unlocked a 2nd stage scenario.
Cleared "The Caged Bird Sings."
Changed the ringtone for Phone Trigger.
Changed the wallpaper on the Phone Trigger standby screen.
Unlocked a 1st stage scenario.
Opened the TIPS LIST.
Opened the MOVIE LIBRARY.
Opened the SOUND LIBRARY.
Opened the CG LIBRARY.
Opened the CLEAR LIST.
Cleared "Dr. Jekyll Online."
Cleared the game with an unread message in Phone Trigger.
Viewed Phone Trigger transmission history at least once.
Replied to a message from someone in Phone Trigger.
Viewed a message in the Phone Trigger reception history at least once.
Started STEINS;GATE - Linear Bounded Phenogram.