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