Fallout 3 was one. I had just transferred to a new college and was dorming. Several of the guys were playing FO3, so I decided to get it, even though I knew almost nothing about FO games. But I knew it'd be something to talk about with people. And it worked, even though I didn't get that far into the game. Made friends; some that 15yrs later I still talk to on occasion. As far as the game itself, I haven't played another FO since; just generally not my kinda game.

My gaming buddies now, who I've known them for several years, have the attention span of goldfish, so I've largely stopped FOMO games purchases. I can't keep spending money on games they'll play for a week or two, or less. Though if it appears there's some longevity, then maybe I'll jump in. Barotrauma and Project Zomboid are a couple where the FOMO eventually won out, but it did pay off. We've sunk hundreds of hours into each game over the last 2-3yrs.