Before he died he also wrote an article staking his position that video games are not a legitimate art form. That doesn't necessarily mean he hated games or would never play one, but it does make it somewhat odd to see a list like this on a site bearing his name.
Roger Ebert also wrote an article staking his position that Star Wars Episode 1 deserved 3½ out of 4 stars, which makes it somewhat odd to see a website bear his name at all.
It's a shame because I generally agreed with most of Ebert's opinions and still miss him as a taste guide for getting an idea of what movies are worth my time. But video games can definitely be art.