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.
Capture the attention of the mysterious crow.
Find the ninja master rat.
Discover the hidden monster under water.
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.
Complete all heroic stages.
Catch a fish.
Help Fredo escape.
Defeat Greenmuck and its minions.
Defeat Ulguk-Hai the Troll Warlord.
Find the 5 legendary lost ice-shrooms.
Complete all iron stages.
Shoot 100 missiles.
Summon 5 rock elementals in any one stage.
Defeat 10 Troll Pathfinders while they're treading on ice.
Find the elusive acorn.
Defeat Sarelgaz and its minions.
Do not let The Kingpin escape.
Drop 1.000 or more bomblets with the cluster bomb.
Defeat Gul'Thak and its minions.
Earn 45 stars.
Have your Paladins perform 100 Holy Strikes.
Sell 30 towers.
Polymorph 50 enemies into sheep.
Throw 500 or more axes.
Complete the campaign.
Defeat Vez'nan.
Disintegrate 50 or more enemies.
Build 4 Tesla towers in any stage.
Sell 5 towers in a single mission.
Teleport 250 or more enemies.
Have your Paladins heal a total of 7.000 life.
Change soldiers' rally point 200 times.
Snipe 50 enemies.
Train 1.00 soldiers.
Have your soldiers regenerate a total of 50.000 life.
Kill 300 enemies with electricity.
Build all 8 towers specializations.
Defeat J.T.
Hold 500 or more enemies with Wrath of the Forest.
Send 1.000 soldiers to their deaths.
Kill 10.000 enemies.
Free the sasquatch on the Icewind Pass.
Have a single barbarian kill 10 enemies.
Earn 30 stars.
Recruit max elves at The Silveroak Outpost.
Kill 100 enemies with meteor showers.
Upgrade all basic tower types to level3.
Build 150 towers.
Have at least 3 Imperial Guards survive in the Citadel.
Defeat The Juggernaut
Kill 50 enemies by poison damage.
Train a hero up to max level.
Earn 15 stars.
Train a hero up to level 5.
Build 100 towers.
Kill 2.500 enemies
Use Rain of Fire 5 times in a single stage.
Call 10 waves early.
Open 5 information cards.
Build 30 towers.
Kill 10 or more sheep with your hands.
Kill 500 enemies.
Call all waves early in a single mission.
Call a wave within 3 seconds of the icon showing up.
Kill one enemy.