'Pac-Man' once felt futuristic. Now there's a new one built entirely by AI.

We all have to look a little harder for reasons to celebrate in this dark year of 2020, but here's a good one: On May 22, Pac-Man turns 40.

The first video game to really catch the attention of a global audience came to Japanese and American arcades in 1980. The round, yellow hero's pellet-chomping, ghost-dodging ways...