Here is the full list of all 93 Fieldrunners achievements.
Get to round 100 on Mudslide in Extended mode on Hard.
Get to round 100 on Frostbite in Extended mode on Hard.
Get to round 100 on Crystal Caves in Extended mode on Hard.
Get to round 100 on Drylands in Extended mode on Hard.
Get to round 100 on Lavaflow in Extended mode on Hard.
Defeat 100,000 fieldrunners.
Get to round 100 on Mudslide in Extended mode on Medium.
Get to round 100 on Skyway in Extended mode on Hard.
Get to round 100 on Frostbite in Extended mode on Medium.
Get to round 100 on Crystal Caves in Extended mode on Medium.
Get to round 100 on Mudslide in Classic mode on Hard.
Get to round 100 on Frostbite in Classic mode on Hard.
Get to round 100 on Lavaflow in Extended mode on Medium.
Get to round 100 on Crossroads in Extended mode on Hard.
Get to round 100 on Crossroads in Classic mode on Hard.
Get to round 100 on Lavaflow in Classic mode on Hard.
Get to round 100 on Drylands in Extended mode on Medium.
Get to round 100 on Mudslide in Classic mode on Medium.
Fully upgrade a Plasma Tower.
Get to round 100 on Crystal Caves in Classic mode on Hard.
Get to round 100 on Skyway in Extended mode on Medium.
Get to round 100 on Skyway in Classic mode on Hard.
Get to round 100 on Drylands in Classic mode on Hard.
Get to round 500 on any map in Endless mode on Easy.
Get to round 100 on Frostbite in Classic mode on Medium.
Get to round 100 on Lavaflow in Extended mode on Easy.
Get to round 100 on Lavaflow in Classic mode on Medium.
Get to round 100 on Crystal Caves in Classic mode on Medium.
Get to round 100 on Skyway in Classic mode on Medium.
Destroy 5,000 air units.
Unlock 50%% of all achievements.
Get to round 250 on any map in Endless mode on Easy.
Fully upgrade a Lava Tower.
Get to round 100 on Drylands in Classic mode on Medium.
Get to round 100 on Grasslands in Extended mode on Hard.
Get to round 100 on Crossroads in Extended mode on Medium.
Get to round 100 on Grasslands in Extended mode on Medium.
Defeat 5,000 fieldrunners with the Flame Tower.
Get to round 150 on any map in Endless mode on Easy.
Get to round 100 on Lavaflow in Classic mode on Easy.
Get to round 100 on Crystal Caves in Extended mode on Easy.
Get to round 100 on Mudslide in Extended mode on Easy.
Slow down 100,000 fieldrunners with the Goo Tower.
Get to round 100 on Drylands in Extended mode on Easy.
Buy and sell 20 towers consecutively.
Get to round 100 on Frostbite in Extended mode on Easy.
Defeat 25,000 fieldrunners.
Fully upgrade an Ice Tower.
Get to round 100 on Skyway in Extended mode on Easy.
Fully upgrade a Laser Tower.
Get to round 100 on Mudslide in Classic mode on Easy.
Get to round 100 on Frostbite in Classic mode on Easy.
Get to round 100 on Skyway in Classic mode on Easy.
Get to round 100 on Crystal Caves in Classic mode on Easy.
Get to round 100 on Drylands in Classic mode on Easy.
Get to round 100 on Crossroads in Extended mode on Easy.
Get to round 100 on Grasslands in Extended mode on Easy.
Get to round 100 on Crossroads in Classic mode on Medium.
Get to round 100 on Grasslands in Classic mode on Medium.
Achieve victory without taking any damage.
Score 850,000 points on any map in a single session.
Get to round 100 on Grasslands in Classic mode on Hard.
Score 500,000 points on any map in a single session.
Fully upgrade a Shotgun Tower
Fully upgrade a Poison Tower.
Fully upgrade a Mortar Tower.
Destroy 500 air units.
Fully upgrade a Flame Tower.
Get to round 100 on Crossroads in Classic mode on Easy.
Defeat 5,000 fieldrunners.
Get to round 100 on Grasslands in Classic mode on Easy.
Destroy 100 air units.
Fully upgrade a Tesla Tower.
Score 100,000 points on any map in a single session.
Fully upgrade a Missile Tower.
Fully upgrade a Goo Tower.
Fully upgrade a Gatling Tower.
Defeat 500,000 fieldrunners.
Defeat 1,000,000 fieldrunners.
Slow down 50,000 fieldrunners with the Ice Tower.
Defeat 5,000 fieldrunners with the Laser Tower.
Defeat 15,000 fieldrunners with the Mortar Tower.
Get defeated 100 times.
Get defeated 500 times.
Get defeated 1,000 times.
Achieve 100 victories.
Achieve 500 victories.
Achieve 100 victories without losing any lives.
Survive any map with only 1 life.
Play 75 rounds consecutively with 1 life.
Unlock all achievements.
Get to round 250 on any map in Endless mode on Medium.
Get to round 150 on any map in Endless mode on Hard.