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