The Half-Life franchise, maybe. Half-Life 2 and up has a lot of physics stuff including the Gravity Gun, but considering HL1 is free to play via Sven Co-op it wouldn’t hurt to start there. You’ll need something like Synergy or Obsidian Conflict to play HL2 cooperatively.
As a religious LGBTQ+ person, I don’t feel the need to flaunt that or give that data. My FAFSA application asked questions about my LGBTQ+ status, and I lied my ass off because I’m scared of what the Nazi so-called-Christians in my government will try to do with that information. I’m a “real” Christian whose favorite Leviticus line isn’t the one about not being gay, it’s 19:18. That part, somehow, slips their minds when making decisions.