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 messages.
Unlocked all CGs.
Viewed all TIPS.
Unlocked a hidden scenario.
Cleared "Abduction Across Three Worlds."
Unlocked a final scenario.
Cleared "The Quantum Awakening."
Unlocked 75% of CGs.
Cleared "Eternal Polaris."
Cleared "Hermaphroditus in the Labyrinth."
Cleared "Superhero Chat-Noir."
Unlocked 50% of CGs.
Cleared "Built with Love."
Unlocked a 3rd stage scenario.
Cleared "Ghostly Rendezvous."
Cleared "Vermillion Soteria."
Unlocked 25% of CGs.
Unlocked a 2nd stage scenario.
Cleared "The Caged Bird Sings."
Unlocked a 1st stage scenario.
Opened the MOVIE LIBRARY.
Opened the SOUND LIBRARY.
Opened the CG LIBRARY.
Cleared the game with an unread message in Phone Trigger.
Cleared "Dr. Jekyll Online."
Changed the ringtone for Phone Trigger.
Changed the wallpaper on the Phone Trigger standby screen.
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.
Opened the TIPS LIST.
Opened the CLEAR LIST.
Started STEINS;GATE - Linear Bounded Phenogram.