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