Matthew Costello is a games writer and designer who started the games industry career in 1900. Since then, Costello has been working with Avalanche Studios, Escalation Studios, id Software and Square Enix. Costello's first game was Clue Chronicles: Fatal Illusion published by Hasbro Interactive for PC. Then, Matthew Costello went on to work on The 7th Guest as the writer. Afterwards, Matthew Costello worked on Just Cause 2 developed by Avalanche Studios in 2010. Most recently, Matthew Costello was involved in the development of RAGE.