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