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.
Change soldiers' rally point 200 times.
Defeat Lord Blackburn to avoid war between kingdoms.
Complete all iron stages.
Summon 5 rock elementals in any one stage.
Complete all heroic stages.
Shoot 100 missiles.
Complete the campaign.
Defeat Moloch the Demon Overlord.
Capture the attention of the mysterious crow.
Defeat Ulguk-Hai the Troll Warlord.
Defeat 9 legions before they replicate.
Discover the hidden monster under water.
Kill 15 Wererats before they sicken any soldier.
Find the ninja master rat.
Defeat Myconid, the Rotten Fungus.
Kill 25 Shrooms without them poisoning your soldiers.
Defeat Greenmuck and its minions.
Find the 5 legendary lost ice-shrooms.
Defeat 10 Troll Pathfinders while they're treading on ice.
Defeat Sarelgaz and its minions.
Do not let The Kingpin escape.
Find the elusive acorn.
Teleport 250 or more enemies.
Help Fredo escape.
Defeat Gul'Thak and its minions.
Drop 1.000 or more bomblets with the cluster bomb.
Kill 50 enemies by poison damage.
Defeat Vez'nan.
Earn 45 stars.
Build 4 Tesla towers in any stage.
Disintegrate 50 or more enemies.
Hold 500 or more enemies with Wrath of the Forest.
Polymorph 50 enemies into sheep.
Kill 300 enemies with electricity.
Snipe 50 enemies.
Earn 30 stars.
Have your soldiers survive the explosion of 300 demons.
Throw 500 or more axes.
Have your Paladins perform 100 Holy Strikes.
Have your Paladins heal a total of 7.000 life.
Catch a fish.
Call all waves early in a single mission.
Call a wave within 3 seconds of the icon showing up.
Build all 8 towers specializations.
Train a hero up to max level.
Have your soldiers regenerate a total of 50.000 life.
Defeat J.T.
Recruit max elves at The Silveroak Outpost.
Kill 10.000 enemies.
Have a single barbarian kill 10 enemies.
Kill 100 enemies with meteor showers.
Train 1.00 soldiers.
Send 1.000 soldiers to their deaths.
Free the sasquatch on the Icewind Pass.
Kill 10 or more sheep with your hands.
Build 150 towers.
Earn 15 stars.
Have at least 3 Imperial Guards survive in the Citadel.
Defeat The Juggernaut
Use Rain of Fire 5 times in a single stage.
Upgrade all basic tower types to level3.
Train a hero up to level 5.
Build 100 towers.
Kill 2.500 enemies
Call 10 waves early.
Build 30 towers.
Open 5 information cards.
Kill 500 enemies.
Kill one enemy.
Sell 30 towers.
Sell 5 towers in a single mission.
Have your Elves deal 10000 points of damage.
Complete the campaign in Veteran mode.
Fire the Sunray 20 times.