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