Here is the full list of all 35 Desktop Dungeons: Rewind achievements.
Fully upgrade your Kingdom
In a standard dungeon, kill any enemy with the Burning effect by striking another foe
Immediately convert ten items bought from standard dungeon shops
Unlock the Goatperson
Break completely through an enemy's physical or magical resistance
Destroy ten walls with PISORF in one standard dungeon run
Kill an enemy five levels above you
Reach 25 maximum mana
Block 1000 points of regeneration with burning or poison
Replace a locker item when all guild slots are full
Upgrade any hero guild to level 3
Reach 200 maximum health
Spend piety on two different gods in one dungeon
Waste fewer than 50 tiles of regeneration to win a standard dungeon run
Get 6 full conversions in one dungeon run
Kill an enemy three levels above you
Gain a level in the middle of a fight to defeat a regular level 10 boss
Petrify an enemy, then earn more than double its experience value on your next kill
Kill an enemy one level above you (any standard dungeon)
Earn extra experience from five enemies in a standard dungeon run while they're slowed
Kill an enemy seven levels above you
Kill an enemy nine levels above you
Have Might, Death Protection and Stone Skin active at the same time (from glyphs or other sources)
Discover all god likes and dislikes
Spend piety on four different gods in one dungeon
Reach 150 total damage
Use five different poison cure methods in a single dungeon run
Spend at least 300 gold on preparations for a single dungeon run
Complete all bronze challenges
Complete all silver challenges
Complete all gold challenges
Unlock the Vampire
Unlock the Gorgon
Unlock the Half-Dragon
Spend 100 hours in the dungeons