Here is the full list of all 50 Star Trek: Infinite achievements.
Build a starship of the largest possible class.
Have a Gaia-class planet that is home to at least 50 Pops.
Free a system by sabotaging a starbase.
Contact all types of Support Powers.
Send 20 gifts.
Hire 10 Nausicaan Leaders.
Upgrade a starbase to the highest level.
Build the highest tier of capital building.
Win a game as the Federation.
Win a game using Civics.
Have 20 colonies at the same time.
Complete 25 Spy Missions.
Liberate a minor power.
Obtain more than 50% of the Balance of Power.
Build a Mining or Research Station inside a Hazard.
Research 100 Technologies.
Fully upgrade the Enterprise. (Federation)
Complete all Mission Tree Nodes for the T.N.G. crew. (Federation)
Recruit Hugh.
Research 20 anomalies.
Unlock the U.S.S. Enterprise. (Federation)
Reach 95% Empire Stability.
Complete the Federation Tradition Tree.
Win a game as the Cardassian Union.
Win a game as the Klingon Empire.
Win a game as the Romulan Star Empire.
Integrate Bajor. (Cardassian)
Reach 100% Global Tension.
Have 50 Slave Pops. (Cardassian)
Defeat the Borg as the Federation.
Defeat the Borg as the Klingon Empire.
Defeat the Borg as the Cardassian Union.
Defeat the Borg as the Romulan Star Empire.
Complete the Klingon Tradition Tree.
Complete the Cardassian Tradition Tree.
Complete the Romulan Tradition Tree.
Engage in a war with all 4 Major Powers simultaneously.
Win a game via Points.
Abolish Slavery via the Mission Tree. (Cardassian)
Reject Kahless. (Klingon)
Accept Kahless. (Klingon)
Choose the less-xenophobic path on the Mission Tree. (Romulan)
Reunite with the Vulcans. (Romulan)
Choose the Warfare path on the Mission Tree. (Federation)
Overthrow a minor power by staging a coup. (Klingon)
Control 5 Puppet States as the Romulan Star Empire.
Assimilate a Puppet State as the Romulan Star Empire.
Help evacuate Romulus. (Federation)
Evacuate Romulus before the Supernova. (Romulan)
Win a war with the Glory to the Empire war goal. (Klingon)