Here is the full list of all 29 Duel Corp. Demo achievements.
Backstab an enemy.
Defeat an enemy.
Slay the thief before you talk to him.
Defeat The Seeker.
Defeat Trezzan, The Tortured.
Defeat Annabelle.
Use the Codex.
Find the Secret Path.
Fall into the trap in the Wooden Hut.
Get hit by a rolling boulder.
Crit an enemy after a perfect parry.
Heal an ally.
Use all ability slots.
Use all talent slots.
Play through the game without a companion.
Ask Elaine for help.
Ask Annabelle for help.
Free the prisoner at the Secret Hut.
Abandon the prisoner at the Secret Hut.
Interrupt the thief in an unconventional way to get your stuff back.
Reach level 10.
Light all candles.
Parry an attack 100 times.
Parry an attack perfectly 100 times.
Deflect a spell 20 times.
Reflect a spell 20 times.
Find all items in the world.
Defeat the Mysterious Paladin in the Silent Whisper Woods.
Defeat the Mysterious Knight in the Silent Whisper Woods.