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