Here is the full list of all 32 Hero Defense achievements worth 1,000 gamerscore.
Complete the coast Guard challenge on insane.
Have at least 1 rune of every type.
Kill any boss using only angry mobs
Insane Difficulty with 100% early calls
Watch the credits to the End
Complete the Border Warden Challenge on insane
Complete the Tower Defense challenge on Insane
Have all heroes do their heroes strike at the same time.
Gather all Stars on all maps.
Shoot 10 Bolts at once
Kill 50.000 Creeps
Charge a character to level 10
Defeat Count Necrosis, once and for all.
Kill a creep that is slowed, poisoned, buring, cursed, scared and cut by razor splinters.
Upgrade every weapon to the highest level
Defeat over 100 Waves in the Endless Mode.
Slow at least 20 creeps with a single attack
Kill 500 Creeps using Spells
Hit at least 20 creeps with a single poison spell.
Defeat Count Necrosis
Defeat Alana Nightshade
Defeat Redfang Wrathborn
Unlock Wylde
Defeat the Queen of Corpses
Unlock Jane Doe
Defeat Dr. Amalgam
Unlock Sam Hain
Survive your first encounter with count Necrosis
Reach the Village
Defeat Bones O'Malley
Unlock Barrows
Fully upgrade the Village