Here is the full list of all 33 WARNO achievements.
Defeat very hard AI in skirmish mode
Complete Airborne Assault campaign with NATO
Defeat medium AI in skirmish mode
Reach Level 5
Trained
Add a friend
Complete Bruderkrieg campaign with NATO
Complete Bruderkrieg campaign with PACT
Complete operation Sledgehammer in any difficulty
Complete operation Hold Until Relieved in any difficulty
Complete operation The Dieburg Salient in any difficulty
Complete operation Götterdammerung on any difficulty
Complete operation The Kitzingen Ruse on any difficulty
Complete operation Backhand Blow on any difficulty
Complete operation Black Horse's Last Stand in any difficulty
Complete operation Red Juggernaut in any difficulty
Complete Fulda Gap campaign with NATO
Complete Fulda Gap campaign with PACT
Complete Airborne Assault campaign with PACT
Complete The Left Hook campaign with NATO
Complete The Left Hook campaign with PACT
Complete Highway 66 campaign with NATO
Complete Highway 66 campaign with PACT
Win a multiplayer game in Conquest mode
Win a multiplayer game in Destruction mode
Win a 2v2 multiplayer game
Win a 3v3 multiplayer game
Win a 4v4 multiplayer game
Win a 10v10 multiplayer game
Defeat easy AI in skirmish mode
Defeat hard AI in skirmish mode
Defeat hardest AI in skirmish mode
Reach Level 20