It's embarrassing but I've never actually heard of this game before despite playing a few Valve games hahah

oh my, HIDDEN, HOW IS THAT POSSIBLE? Portal 2 came out a little bit late compared to other gems like Left 4 Dead 2, I think Valve's golden age was ending when Portal 2 was released.

Hey, don't judge a game bc its release date. Left 4 Dead 2 is one that despite being 2 decades old since it was released, there are a lot of active users still playing it. Even dedicated servers :P