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