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