Here is the full list of all 44 DNF Duel achievements.
Purchase a Gallery item for the first time
Clear Arcade Mode once
Spend 50,000Gold
Clear a Character Story for the first time
Clear 5 Character Stories
Clear all Character Stories
Aquire a win in Online Mode
Compete in 100 matches in Online Mode
Compete in 300 matches in Online Mode
Enter the Player Match Room for the first time
Complete a Player Match
Purchase over 100 Titles
Purchase all Battle Card Designs
Purchase all illustrations, BGM, movies and Character Voices
Clear Survival Mode A Course
Clear Survival Mode B Course
Clear Survival Mode C Course
Completed 10 consecutive Survival Mode matches without purchasing HP recovery
Defeat the strengthened Lost Warrior in Arcade Mode
Complete all Tutorials for 1 character
Use 5 different Basic Combos
Clear 5 different Challenges
Complete all Basic Combos/Challenges for one character
Watch a replay for the first time
Play Training Mode for a total of 1 hour
Save a Recording for the first time
Complete 10 Matches as Berserker
Complete 10 Matches as Striker
Complete 10 Matches as Grappler
Complete 10 Matches as Inquisitor
Complete 10 Matches as Ranger
Complete 10 Matches as Dragon Knight
Complete 10 Matches as Hitman
Complete 10 Matches as Kunoichi
Complete 10 Matches as Enchantress
Complete 10 Matches as Vanguard
Complete 10 Matches as Swift Master
Complete 10 Matches as Ghostblade
Complete 10 Matches as Trouble Shooter
Complete 10 Matches as Crusader
Complete 10 Matches as Launcher
Complete 10 Matches as Lost Warrior
Purchase all Icons
All Trophies Acquired