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