Full list of all 20 SpaceChem achievements. It takes around 15-20 hours to unlock all of the achievements in the base game on Windows.
The base game contains 19 achievements, and there is 1 DLC pack containing 1 achievements.
Beat the assignment "Molecular Foundry" using two or fewer reactors.
Beat the assignment "Challenge: KOHCTPYKTOP".
Beat the assignment "Falling" using two or fewer reactors.
Beat the assignment "Moustachium 608".
Beat the assignment "No Thanks Necessary" in under 2200 cycles.
Beat the assignment "Challenge: Applied Fusion".
Beat the game!
Beat the assignment "Σ-Ethylene" in under 6000 cycles.
Beat the assignment "Gas Works Park" in under 2700 cycles.
Beat the assignment "Moustachium 604".
Beat the assignment "Moustachium 602".
Beat the assignment "Challenge: Going Green".
Beat 3 published ResearchNet assignments.
Beat 10 published ResearchNet assignments.
Beat 20 published ResearchNet assignments.
Beat the assignment "No Ordinary Headache" using only one reactor.
Beat the assignment "Challenge: In-Place Swap".
Beat the assignment "Nothing Works" in under 1000 cycles.
Reach the south pole of Sernimir IV.
Beat the assignment "Collapsar" in the 63 Corvi campaign.