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.
Fire the Sunray 20 times.
Complete the campaign in Veteran mode.
Find the ninja master rat.
Defeat Lord Blackburn to avoid war between kingdoms.
Discover the hidden monster under water.
Capture the attention of the mysterious crow.
Kill 15 Wererats before they sicken any soldier.
Defeat Moloch the Demon Overlord.
Complete all heroic stages.
Complete all iron stages.
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.
Do not let The Kingpin escape.
Defeat Sarelgaz and its minions.
Defeat 9 legions before they replicate.
Shoot 100 missiles.
Summon 5 rock elementals in any one stage.
Defeat Ulguk-Hai the Troll Warlord.
Find the 5 legendary lost ice-shrooms.
Find the elusive acorn.
Defeat 10 Troll Pathfinders while they're treading on ice.
Help Fredo escape.
Drop 1.000 or more bomblets with the cluster bomb.
Defeat Gul'Thak and its minions.
Build 4 Tesla towers in any stage.
Complete the campaign.
Defeat Vez'nan.
Have a single barbarian kill 10 enemies.
Have your Paladins perform 100 Holy Strikes.
Earn 45 stars.
Have your Paladins heal a total of 7.000 life.
Teleport 250 or more enemies.
Have your soldiers survive the explosion of 300 demons.
Hold 500 or more enemies with Wrath of the Forest.
Polymorph 50 enemies into sheep.
Kill 50 enemies by poison damage.
Kill 300 enemies with electricity.
Build all 8 towers specializations.
Defeat J.T.
Throw 500 or more axes.
Sell 30 towers.
Train 1.00 soldiers.
Free the sasquatch on the Icewind Pass.
Kill 10 or more sheep with your hands.
Earn 30 stars.
Snipe 50 enemies.
Disintegrate 50 or more enemies.
Kill 10.000 enemies.
Have your soldiers regenerate a total of 50.000 life.
Change soldiers' rally point 200 times.
Send 1.000 soldiers to their deaths.
Have at least 3 Imperial Guards survive in the Citadel.
Defeat The Juggernaut
Train a hero up to max level.
Use Rain of Fire 5 times in a single stage.
Build 150 towers.
Kill 100 enemies with meteor showers.
Kill 2.500 enemies
Build 100 towers.
Earn 15 stars.
Upgrade all basic tower types to level3.
Recruit max elves at The Silveroak Outpost.
Train a hero up to level 5.
Catch a fish.
Open 5 information cards.
Sell 5 towers in a single mission.
Kill 500 enemies.
Build 30 towers.
Call 10 waves early.
Call a wave within 3 seconds of the icon showing up.
Call all waves early in a single mission.
Kill one enemy.