Here is the full list of all 43 Deathsmiles I・II achievements.
Reach a score of 300,000,000 points. (Arcade, Normal only)
Reach a score of 200,000,000 points. (Arcade, Normal only)
Clear the game using Ranun without continuing.
Clear the game using Rosa without continuing.
Clear the Gorge and Hades Castle having selected Level 3 for all stages. (Arcade, Normal only)
Clear the game. (no continues. Arcade, Normal only)
Reach a score of 100,000,000 points. (Arcade, Normal only)
Select Level 3 five times while playing. (Arcade, Normal only)
Clear the game using Plumeria without continuing.
Clear the game using Cattleya without continuing.
Defeat Tyrannosatan, the Demonic Imperator!
Defeat Jitterbug, He who Opens the Door!
Defeat Devaria and Givaria, the Twin Wyrms!
Defeat Bavaria, the God of Flames!
Defeat Mary, the Giant Cow!
Defeat Sakura, Witch of the Swamp Wastes!
Defeat Jordan, the Buried Baron!
Defeat a boss while in Power-up Mode.
Defeat Whroon, Conjurer of the Forest!
Defeat Deathscythe, the Wandering Reaper!
Select Level 3 for all stages, and clear Lost Paradise and Chateau in IIX Mode. (no continues)
Reach a score of 1,000,000,000 points in IIX Mode.
Clear Arranged Mode without continuing at any level.
Throw a Familiar at any level.
Make 1,024 items of any type appear at any level.
Clear the game in either Arcade or IIX Mode at any level.
Defeat Satan Claws in Arcade or IIX Mode at any level.
Defeat Mad Teddy & Mad Bunny in IIX Mode at any internal rank.
Defeat Tamecos in either Arcade or IIX Mode at any level.
Defeat Heavy Snake in either Arcade or IIX Mode at any level.
Defeat Bigote in either Arcade or IIX Mode at any level.
Defeat Tartaros in IIX Mode at any level.
Defeat Lily in either Arcade or IIX Mode at any level.
You have obtained all of the achievements.
Clear Deathsmiles Version 1.1 with all maps at Level 3! (no continues, incl. EXMAP)
Reach a score of 10,000,000,000 points. (MBL Ver. 1.1 only)
Stay in Power-up Mode for more than 60 seconds at any level.
Maintain Fever Mode for more than 60 seconds at any level.
Defeat Pigeon Blood Jitterbug.
Reach a score of 4,000,000,000 points.
Reach a score of 6,000,000,000 points in IIX Mode.
Clear the game using Souffle without continuing.