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