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