This is some old school, under the radar, third person shooter dungeon/campaign game.
You can play online here, but only with two people, you and that one friend that is ready to play whatever game you have in mind. (That's a true friend)
#Banzai Escape 2: Subterranean
signal copper
Now, I'm not sure about the community of this game, I never got into that part, but as a guy who only plays free games (that's probably gonna change after 2-3 years and I can finally start saving up for hobbies and stuff) this is actually.. fun to me.
No surprise, old school feel where you just shoot and crouch behind physical cover, you don't press a button and automatically lean to cover like The Last Of Us or Uncharted, none of that, you trust your movement and your spatial awareness in games to cover your physical body from bullets.
Gunplay, straightforward, where you aim the cursor, the bullets go that way, more spread if you hold down the trigger on a rifle or SMG, more precision from controlled bursts or single shots.
Headshots multiply damage, and since you're likely playing the game on your own, you best get only headshots.
Get into that habit because it's gonna get dicking hard, like they're laying the pipe hard when you finish the first run and get into this optional quest mission.
Oh, it's also a system with leveled gear and drops, if you get lucky, don't accidentally remove your best items.