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