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