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