Very similar to 
Angels, with only minor differences. Gains the Bloodsuck skill, needed to get blood to use other class-specific skills and spells.
Human[]
Your basic human with nothing special. Everybody starts as one.
Skills:
- None
Quests:
- The Sacred Stone
- Needed to upgrade to
Vampire.
- Needed to upgrade to
Vampire[]
The first tier of the Demon class.
Skills:
- Bloodsuck
- Can drink the blood of players and Human or Vampire creatures. Chance based on your attack and target's defense.
- Can use the blood to use other Demon skills.
- Vampyric Rejuvenation
- Heal 5 HP every hour.
Quests:
- Dark Destiny
- Gives a Dark Ring and a Light Crystal.
- The Dark Crystal needed to complete Dark Destiny is awarded from Light Destiny, the Monk equivalent.
- The Light Crystal awarded during Dark Destiny is needed to complete Light Destiny.
- Vampyric Mastery
- Gives the skill Vampyric Rejuvenation, healing you for 5 HP every hour.
- Vampire Revert
- Allows you to revert back to Human.
- Allows you to revert back to
- Demonic Prowess
- Needed to upgrade to Demon.
- Increases base stats
- +10 HP
- +10 Atk
- +10 Def
- Needed to upgrade to
Demon[]
The second tier of the Demon class. Gains access to teleport.
Skills:
Spells:
- Reading Demonic Teleport Scroll Gives Demonic Teleport
- Teleport for the Demon class.
Quests:
- Demon Revert
- Allows you to revert back to Vampire.
- Allows you to revert back to
- Demonic Intent
- Needed to upgrade to Greater Demon.
- Needed to upgrade to
Greater Demon[]
The third tier of the Demon class. Gains access to summons.
Skills:
- Bloodsuck
- Vampyric Rejuvenation
- Summoner
- Allows you to summon creatures that you can control.
Spells:
- Demonic Teleport
- Summon Imp Scroll
- Reading allows you to summon an Imp.
Quests:
- The Greater Demon
- Increases base stats
- Gained 10 Atk
- Gained 10 Def
- Gained 15 HP
- Gained 15 MP
- Gained 15 AP
- Increases base stats
- Infernal Upgrade
- Needed to upgrade to Infernal.
- Needed to upgrade to
Infernal[]
The fourth tier of the Demon class.
Skills:
- Bloodsuck
- Vampyric Rejuvenation
- Summoner
- Turn Angelic
- Turns a creature into a Celestial. This skill costs 2 AP.
- Turns a creature into a
- Demonic Wrath
- Gives a 10% increase to melee and magic damage/healing done to Angels, Transcendants, and Celestials.
- Gives a 10% increase to melee and magic damage/healing done to
- Warp Flux
- Allows you to set a point which you can then return to for 1 AP.
- Demonic Possession
- Increases Attack, Defense, HP, and MP by 25%.
- Costs 50 blood to activate, and 15 blood to upkeep every respawn period (respawns are every 30 minutes).
- Immunity
- Removes all viruses for 3 blood.
Spells:
- Demonic Teleport Scroll
- Summon Imp
Quests:
- Infernal Trainer
- Gives access to the Demonic Possession and Immunity skills.
- Infernal Plans - requires level 15,000
- Needed to upgrade to Diabolic.
- Needed to upgrade to
Diabolic[]
The fifth tier of the Demon class.
Skills:
- Bloodsuck
- Vampyric Rejuvenation
- Summoner
- Turn Angelic
- Demonic Wrath
- Warp Flux
- Demonic Possession
- Immunity
- Rune Master++
- Allows you to use a fourth rune
Spells:
- Demonic Teleport Scroll
- Summon Imp
Quests:
- None