Here is the full list of all 28 STEINS;GATE 0 achievements. It takes around 35-40 hours to unlock all of the achievements on Windows.
100% Completed Steins;Gate 0.
Saw all TIPS.
Cleared "Gehenna's Stigma".
Cleared "Twin Automata".
Saw all CG.
Cleared "Recursive Mother Goose".
Cleared "Milky-way Crossing".
Saw 75% of CG.
Cleared "Promised Rinascimento".
Cleared "Antinomic Dual".
Cleared "The Orbital Eclipse".
Cleared "A Stray Sheep".
Opened Clear List.
Opened Movie Library.
Opened Sound Library.
Opened CG Library.
Cleared "Vega and Altair".
Read and ignored a message.
Saw 50% of CG.
Cleared "Presage or Recognize".
Cleared "Pandora's Box".
Cleared "X-Day Protocol".
Saw 25% of CG.
Cleared "Closed Epigraph".
Cleared "Missing Link".
Answered a message from someone.
Began Steins;Gate 0.
Opened TIPS List.