Here is the full list of all 48 Deathsmiles achievements.
Defeated Devaria and Givaria, the Twin Wyrms!
Continued once while playing.
Defeated Bavaria, the God of Flames!
Defeated Mary, the Giant Cow!
Defeated Sakura, Witch of the Swamp Wastes!
Defeated Ulan, Conjurer of the Forest!
Defeated Jordan, the Buried Baron!
Defeateded Deathscythe, the Wandering Reaper!
Played any mode once.
Defeated Jitterbug, He Who Opens the Door!
Defeated Tyrannosatan, the Demonic Imperator!
Selected Level 3 five times while playing.
Cleared the Gorge and Hades Castle having selected Lv3 for all stages.
Cleared the game without using any bombs.
Cleared the game with Windia.
Cleared the game using Windia without continuing.
Cleared the game with Casper.
Cleared the game using Casper without continuing.
Cleared the game with Follett.
Cleared the game using Follett without continuing.
Cleared the game with Rosa.
Cleared the game using Rosa without continuing.
Cleared the game with all characters.
Returned Windia to the real world.
Chose to stay in Gilverado with Windia.
Returned Casper to the real world.
Chose to stay in Gilverado with Casper.
Returned Follett to the real world.
Chose to stay in Gilverado with Follett.
Returned Rosa to the real world.
Chose to stay in Gilverado with Rosa.
Cleared any stage with 0.5 lives and 0 bombs.
Picked up 4 life-recovery items in one playthrough.
Waited for Sakura to explode while playing as Windia.
Score has reached 100,000,000 points.
Score has reached 200,000,000 points.
Score has reached 300,000,000 points.
Clear Deathsmiles Version 1.1! (Continue OK)
Cleared Deathsmiles Version 1.1 with all maps at Lv3! (No Continues, Ex Map included）
Moved your demon friend!
Powered up at 500.
Returned Sakura to the real world.
Chose to stay in Gilverado with Sakura.
Defeated Ozier.
Cleared all 6 chapters at level 999 (continue may be used).
Defeated Bloody Jitterbug.
Chose Level 999 once.
Score has reached 10,000,000,000 points in Mega Black Label 1.1 mode.