Here is the full list of all 77 Revenge of the Titans achievements.
Blew up 250 Titans using explosives
Fully upgraded a turret
Nuked 250 Titans from orbit
Nuked 100 Titans from orbit
Vanquished 10,000 Titans
New rank: field marshal
Made $15,000 profit from one mission
Researched everything
Researched all science and technology
New rank: general
Researched all turret upgrades
Researched all explosive tech
New rank: lieutenant general
Researched all defenses
Got $50,000 in the bank
Turned 100 3-D Titans into 2-D Titans
Researched the droid factory
Squished 50 Titans under new buildings
Got $25,000 in the bank
Completed the Titan missions
Destroyed the Ultratitan!
Researched all weapons
New rank: major general
Made $10,000 profit from one mission
Researched the decoy tower
Blew up 100 Titans using explosives
Researched nuclear reactors
Vanquished 5,000 Titans
Completed the Saturn missions
Destroyed a Behemoth
Used the freeze powerup 5 times
Nuked the site from orbit 5 times
Made $5,000 profit from one mission
Crushed 25 Titans under new buildings
Completed the Mars missions
Destroyed a Gargantuan
Repaired your buildings 5 times
Used the shield powerup 5 times
Used bezerk powerup 5 times
Vanquished 2,500 Titans
Lost 100 buildings to the enemy
Got $10,000 in the bank
New rank: brigadier
New rank: colonel
Completed the Moon missions
Got $5,000 in the bank
Destroyed a Leviathan
Lost 50 buildings to the enemy
Vanquished 1,000 Titans
New rank: lieutenant colonel
Lost 25 buildings to the enemy
Giant Titan killed within a few metres of the base
New rank: major
Completed whole world at maximum difficulty
New rank: captain
Completed the Earth missions
Vanquished 500 Titans
Defeated a Megatitan
Lost 10 buildings to the enemy
New rank: lieutenant
Nuked 50 Titans from orbit
Vanquished 250 Titans
New rank: second lieutenant
Vanquished 100 Titans
New rank: warrant Officer
Completed all missions at maximum difficulty
Fried 100 Titans with the Capacitor
Fried 250 Titans with the Capacitor
Fried 500 Titans with the Capacitor
Blew up 500 Titans using explosives
Base held together with tape and string at end of mission
Lost 90% of your buildings to the enemy
Defeated 1 Xmas Ultrayeti
Defeated 2 Xmas Ultrayetis
Defeated 3 Xmas Ultrayetis
Defeated 4 Xmas Ultrayetis
Hurrah! Christmas is finally over!