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