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.
Complete all heroic stages.
Complete all iron stages.
Find the ninja master rat.
Fire the Sunray 20 times.
Have your Elves deal 10000 points of damage.
Defeat Moloch the Demon Overlord.
Defeat Lord Blackburn to avoid war between kingdoms.
Train 1.00 soldiers.
Discover the hidden monster under water.
Capture the attention of the mysterious crow.
Change soldiers' rally point 200 times.
Defeat Ulguk-Hai the Troll Warlord.
Find the 5 legendary lost ice-shrooms.
Defeat 10 Troll Pathfinders while they're treading on ice.
Find the elusive acorn.
Do not let The Kingpin escape.
Summon 5 rock elementals in any one stage.
Defeat 9 legions before they replicate.
Sell 30 towers.
Send 1.000 soldiers to their deaths.
Have your Paladins perform 100 Holy Strikes.
Defeat Sarelgaz and its minions.
Help Fredo escape.
Kill 15 Wererats before they sicken any soldier.
Defeat Gul'Thak and its minions.
Kill 10.000 enemies.
Earn 45 stars.
Defeat Myconid, the Rotten Fungus.
Kill 300 enemies with electricity.
Kill 25 Shrooms without them poisoning your soldiers.
Defeat Greenmuck and its minions.
Train a hero up to max level.
Have your soldiers regenerate a total of 50.000 life.
Have your Paladins heal a total of 7.000 life.
Have your soldiers survive the explosion of 300 demons.
Throw 500 or more axes.
Have a single barbarian kill 10 enemies.
Complete the campaign.
Defeat Vez'nan.
Hold 500 or more enemies with Wrath of the Forest.
Drop 1.000 or more bomblets with the cluster bomb.
Sell 5 towers in a single mission.
Polymorph 50 enemies into sheep.
Build 4 Tesla towers in any stage.
Earn 30 stars.
Teleport 250 or more enemies.
Build all 8 towers specializations.
Defeat J.T.
Snipe 50 enemies.
Build 150 towers.
Shoot 100 missiles.
Free the sasquatch on the Icewind Pass.
Kill 2.500 enemies
Defeat The Juggernaut
Have at least 3 Imperial Guards survive in the Citadel.
Disintegrate 50 or more enemies.
Kill 50 enemies by poison damage.
Build 100 towers.
Earn 15 stars.
Recruit max elves at The Silveroak Outpost.
Kill 100 enemies with meteor showers.
Upgrade all basic tower types to level3.
Train a hero up to level 5.
Call 10 waves early.
Build 30 towers.
Kill 500 enemies.
Open 5 information cards.
Use Rain of Fire 5 times in a single stage.
Catch a fish.
Kill 10 or more sheep with your hands.
Call all waves early in a single mission.
Kill one enemy.
Call a wave within 3 seconds of the icon showing up.