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