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