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