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Isaac Schuster is a Greek demigod son of Hephaestus. He uses Greek fire, pots of glue, and his sword as weapons. He also goes to the Underworld with Percy, Annabeth, Grover, Luke, and Victoria in The Lightning Thief video game. He is a character made specifically for the game and doesn't appear in any of the books or movies.


Isaac has red hair and has green eyes. He is about the same age as Percy.


Isaac's attacks often inflict statuses to enemies. He also has a move that gives Haste to a party member. He is resistant to Physical attack but is vulnerable to Poison.

Ability Name Effects Ability Cost
Smoke Bomb Physical damage and Blind against all enemies. 8
Tune Up Healing for one ally. 5
Glue Pot Light Physical damage and Slow against one enemy. 4
Silver Cloud Physical Damage and Weak vs. Water against one enemy. 6
Repair Heal and Resurrect one ally. 8
Greek Fire Fire damage against all enemies. 7
Wind Up Haste for one Ally. Increases Teamwork. 3
Temper Increase Protection and Strength for one ally. Increases Teamwork. 4
Grapeshot Three light Physical attacks against all enemies. 9
System Purge Heal all allies and Recover from effects. 8
Tar Trap Slow and Weak vs Fire against all enemies. 8

Hephaestus, his father.