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