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