[1] She was the creative director for Free Realms, a massively multiplayer virtual world for teens and tweens.

Citing her role as spokesperson for Free Realms in addition to designer, Massive Online Gamer stated she was "instrumental in building awareness, visibility, and interest".

She was also lead designer for Full Spectrum Warrior at Pandemic Studios, and worked with John Singleton and Snoop Dogg on the canceled game Fear & Respect.

[6] She wrote a post-mortem of Free Realms that was published in the April 2010 Game Developer Magazine.

[9][10] McWilliams died of complications from heart surgery in Seattle, Washington on February 5, 2024, at the age of 58.