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