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