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.
Complete all iron stages.
Complete all heroic stages.
Complete the campaign.
Summon 5 rock elementals in any one stage.
Have your Elves deal 10000 points of damage.
Snipe 50 enemies.
Shoot 100 missiles.
Drop 1.000 or more bomblets with the cluster bomb.
Sell 30 towers.
Have a single barbarian kill 10 enemies.
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.
Find the 5 legendary lost ice-shrooms.
Defeat Moloch the Demon Overlord.
Kill 50 enemies by poison damage.
Defeat Lord Blackburn to avoid war between kingdoms.
Defeat Ulguk-Hai the Troll Warlord.
Build 4 Tesla towers in any stage.
Defeat 9 legions before they replicate.
Defeat Greenmuck and its minions.
Sell 5 towers in a single mission.
Teleport 250 or more enemies.
Kill 15 Wererats before they sicken any soldier.
Throw 500 or more axes.
Polymorph 50 enemies into sheep.
Defeat 10 Troll Pathfinders while they're treading on ice.
Defeat Sarelgaz and its minions.
Do not let The Kingpin escape.
Defeat Gul'Thak and its minions.
Have your Paladins perform 100 Holy Strikes.
Disintegrate 50 or more enemies.
Kill 300 enemies with electricity.
Build all 8 towers specializations.
Change soldiers' rally point 200 times.
Earn 45 stars.
Kill 10.000 enemies.
Train 1.00 soldiers.
Find the ninja master rat.
Find the elusive acorn.
Help Fredo escape.
Free the sasquatch on the Icewind Pass.
Catch a fish.
Kill 10 or more sheep with your hands.
Defeat Vez'nan.
Hold 500 or more enemies with Wrath of the Forest.
Earn 30 stars.
Kill 100 enemies with meteor showers.
Have your soldiers survive the explosion of 300 demons.
Have your Paladins heal a total of 7.000 life.
Send 1.000 soldiers to their deaths.
Defeat J.T.
Have your soldiers regenerate a total of 50.000 life.
Upgrade all basic tower types to level3.
Build 150 towers.
Have at least 3 Imperial Guards survive in the Citadel.
Defeat The Juggernaut
Kill 2.500 enemies
Train a hero up to max level.
Build 100 towers.
Earn 15 stars.
Recruit max elves at The Silveroak Outpost.
Train a hero up to level 5.
Use Rain of Fire 5 times in a single stage.
Open 5 information cards.
Call 10 waves early.
Build 30 towers.
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.