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