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