I played the Buck Rogers XXVc: Countdown to Doomsday computer game on my old 286 PC back in 1990. Inside the box was an advertisement for the Buck Rogers XXVc tabletop role-playing game by TSR that the computer game was based on. I really enjoyed the computer game. About a month later, a new comic book and tabletop gaming store opened up nearby, and a friend of mine and I went to check it out. I looked for, and found, the Buck Rogers XXVc boxed set (the very last boxed set TSR produced if I understand correctly), and my friend picked up the Robotech RPG by Palladium Books. I GMed Buck Rogers XXVc, my friend GMed Robotech. That's how it started. Eventually, our group expanded, and we alternated between Buck Rogers XXVc, Robotech, Villains & Vigilantes, DC Heroes, Heroes Unlimited, Star Wars d6, and Shadowrun. Out of those, my favorites are Buck Rogers XXVc and DC Heroes.
Now, I play two tabletop RPGs a week online. Every Tuesday night, I play StarCluster 4, which is an independently published science-fiction tabletop RPG with several different settings available. Every Saturday night, I play Starfinder. They're very different from each other rules wise, but I enjoy playing both.