Here is the full list of all 39 Pandemic: The Board Game achievements.
Win 100 games.
Win 40 games.
Win at legendary difficulty with the team: Researcher, Dispat., Op. Expert, Contingency Pl., Epidem.
Save the world with 5 players at legendary difficulty.
Win at difficult level or higher with the team: Troub., Gen., Contingency Pl., Archivist, Field Op.
Eradicate the purple disease for the first time.
Save the world from a mutation at legendary difficulty.
Win a game with the virulent strain and a mutation at legendary difficulty.
Save the world from a mutation at normal difficulty or higher.
Save the world from a mutation while having discovered the 5 cures.
Find a cure for the purple disease for the first time.
Save the world from a virulent strain at legendary difficulty.
Save the world from a virulent strain at normal difficulty or higher.
Eradicate the virulent strain for the first time.
Win at difficult level or higher with the team: Dispatcher, Operation’s Expert, Troubleshooter.
Win at difficult level or higher with the team: Scientist, Op. Expert, Field Op.
Win at difficult level or higher with the team: Medic, Quarantine Spec., Containment Specialist.
Win at difficult level or higher with the team: Researcher, Epidemiologist, Archivist.
Use the Discover a Cure action twice in a single turn.
Win at easy level or higher with the team: Contingency Pl., Dispatcher, Op. Expert, Quarantine Spec.
Win at easy level or higher with the team: Researcher, Scientist.
Win 15 games.
Win without triggering any outbreaks.
Eradicate all 4 diseases in a game.
Win with 18 or more cards left in the player deck.
Win with 24 or more cards left in the player deck.
Win 5 games.
Win a game on the last round.
Eradicate 3 diseases in a game.
Eradicate 2 diseases in a game.
Win a game on heroic difficulty.
Win a game on standard difficulty.
Win a game on introductory difficulty.
Win with 12 or more cards left in the player deck.
Win a game with the "dream team" (the medic, the scientist and the researcher).
Eradicate your first disease.
Cure a disease.
Treat your first disease.
Complete the tutorial.