Here is the full list of all 35 Flame Over achievements.
Reach the Laboratory level
Complete the ‘Safe Cracker’ Mission
Reach the Executive level
Complete a level only using the Hose
Complete a Stage
Rescue Miss Ion
Complete the ‘Lost Property’ Mission
Cut the power to a level using a fuse board room.
Rescue a Worker
Rescue a Cat
Buy a stat upgrade
Revive a fallen person with the Defibrillator
Complete the ‘Paper Chase’ Mission
Complete the ‘Data Protection’ Mission
Complete the ‘The Truth is In Here’ Mission
Complete the ‘Gas Leak’ Mission
Complete the ‘Missile Memory’ Mission
Complete the ‘Employment Terminated’ Mission
Complete a Level with 0 seconds left on the clock
Complete a level only using the Extinguisher
Defeat the Grim Reaper
Freeze 10 proximity barrels before they explode
Complete all Missions in a single game session
Buy one of every powerup
Die one hundred times
Throw 100 Water Bombs
Avoid the Grim Reaper for over 1 minute
Reach the Factory level
Meet the Devil
Complete the game
Complete the game in under 1 hour
Complete the game saving all Cats, all People and completing all Missions
Complete the game without buying any powerups
Upgrade all player stats fully
Complete the game, saving all people without any of them being downed by fire