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