Here is the full list of all 33 Transistor achievements. It takes around 15-20 hours to unlock all of the achievements on Windows.
Complete each Speed Test.
Clear one of each Test.
Complete five encounters with all 10 Limiters in use.
Unlock 32 MEM.
Achieve User Level 16.
Complete five encounters with five or more Limiters in use.
Inspect all completed Limiter Files.
Unlock every Process Limiter.
Complete each Planning Test.
Deal at least 2048 damage in one Turn() in the Practice Test.
Deal at least 1024 damage in one Turn() in the Practice Test.
Upgrade a Function with a copy of itself.
Inspect all completed Function Files.
Inspect 10 completed Function Files.
Create a Function combination requiring 12 MEM.
Inspect five completed Function Files.
Unlock every Transistor Function.
Complete the story.
Confront Royce beyond Cloudbank.
Complete each Stability Test.
Confront Grant and Asher at Bracket Towers.
Achieve User Level 8.
Use 10 different OVC Terminals.
Confront the Spine at the Bracket Towers facade.
Complete five encounters with one or more Limiters in use.
Confront Sybil at the Empty Set.
Reach the Goldwalk District.
Complete each Performance Test.
Complete each Agency Test
Clear every Test.
Recurse through the story.
Unlock every Upgrade Slot and Passive Slot.
Achieve User Level 24.