Avellone begins working as a freelance writer and designer, collaborating with numerous studios on various projects. This allows him to explore different genres and work with new teams.

Avellone works on "Torment: Tides of Numenera", a spiritual successor to "Planescape: Torment". He contributes to the game's writing and design, helping to capture the same philosophical and narrative depth of the original.

Avellone works on "Prey", a first-person shooter with RPG elements. He contributes to the game's story and world-building.

Avellone contributes to "Divinity: Original Sin II", a critically acclaimed RPG. He provides writing and design support, helping to enhance the game's narrative and character development.

Avellone contributes to "Into the Breach", writing character dialogue for pilots. The strategy game became a critical and commercial success.

Avellone contributes to "Star Wars Jedi: Fallen Order", a "Star Wars" action-adventure game developed by Respawn Entertainment and published by Electronic Arts.

Avellone was involved in the writing of "Dying Light 2: Stay Human". However, the game's developer Techland severed ties with Avellone following allegations of sexual harassment in 2020. His contributions to the game reportedly remained in the final release.