As a kid, probably Lode Runner. It ran on my pc. Some arcade games were fun. I enjoyed Asteroids. Colossal Cave, and the Infocom games like Planetfall were fun too. Though what really hooked me was Doom. It was the first real 3d FPS game and it blew my mind. It’s been my favorite genre ever since.
He’s referring to the fact that the Effective Altruism / Less Wrong crowd seems to be focused almost entirely on preventing an AI apocalypse at some point in the future, and they use a lot of obscure math and logic to explain why it’s much more important than dealing with war, homelessness, climate change, or any of the other issues that are causing actual humans to suffer today or are 100% certain to cause suffering in the near future.