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