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