Here is the full list of all 74 Kingdom Rush achievements. It takes around 20-25 hours to unlock all of the achievements on Windows.
Complete the campaign in Veteran mode.
Fire the Sunray 20 times.
Drop 1.000 or more bomblets with the cluster bomb.
Snipe 50 enemies.
Complete the campaign.
Complete all heroic stages.
Complete all iron stages.
Teleport 250 or more enemies.
Have your Elves deal 10000 points of damage.
Defeat Myconid, the Rotten Fungus.
Kill 25 Shrooms without them poisoning your soldiers.
Defeat Lord Blackburn to avoid war between kingdoms.
Defeat Greenmuck and its minions.
Do not let The Kingpin escape.
Defeat Ulguk-Hai the Troll Warlord.
Find the 5 legendary lost ice-shrooms.
Defeat 10 Troll Pathfinders while they're treading on ice.
Defeat Moloch the Demon Overlord.
Defeat 9 legions before they replicate.
Shoot 100 missiles.
Hold 500 or more enemies with Wrath of the Forest.
Kill 50 enemies by poison damage.
Discover the hidden monster under water.
Find the ninja master rat.
Capture the attention of the mysterious crow.
Polymorph 50 enemies into sheep.
Defeat Sarelgaz and its minions.
Build 4 Tesla towers in any stage.
Defeat Gul'Thak and its minions.
Disintegrate 50 or more enemies.
Throw 500 or more axes.
Kill 15 Wererats before they sicken any soldier.
Find the elusive acorn.
Help Fredo escape.
Change soldiers' rally point 200 times.
Defeat Vez'nan.
Have your Paladins perform 100 Holy Strikes.
Have your Paladins heal a total of 7.000 life.
Earn 45 stars.
Kill 300 enemies with electricity.
Kill 10.000 enemies.
Summon 5 rock elementals in any one stage.
Sell 30 towers.
Sell 5 towers in a single mission.
Train 1.00 soldiers.
Build all 8 towers specializations.
Upgrade all basic tower types to level3.
Kill 10 or more sheep with your hands.
Send 1.000 soldiers to their deaths.
Have your soldiers survive the explosion of 300 demons.
Have your soldiers regenerate a total of 50.000 life.
Earn 30 stars.
Defeat J.T.
Have a single barbarian kill 10 enemies.
Kill 2.500 enemies
Free the sasquatch on the Icewind Pass.
Kill 100 enemies with meteor showers.
Build 150 towers.
Defeat The Juggernaut
Have at least 3 Imperial Guards survive in the Citadel.
Build 100 towers.
Earn 15 stars.
Recruit max elves at The Silveroak Outpost.
Train a hero up to max level.
Train a hero up to level 5.
Open 5 information cards.
Kill 500 enemies.
Use Rain of Fire 5 times in a single stage.
Catch a fish.
Build 30 towers.
Call 10 waves early.
Call all waves early in a single mission.
Call a wave within 3 seconds of the icon showing up.
Kill one enemy.