I will become Atheist if.....

[robvalue]

I read the OP as, "I'm tired of carrying around this religious dogma, but I don't feel comfortable letting go of it until I have some other belief system to replace it with".

I can understand that, it could seem weird for someone raised in a heavily religious setting to develop their own ideas from the ground up. It's like leaving an on-rails shooter and entering an open-world RPG. My advice would be to embrace this as an opportunity rather than worrying about the uncertainty. There's no need to come to all your conclusions at once.

But what is the purpose of the game? Who made it? What do they want us to do? How do we know if we're winning? Gays should be excluded from hunting parties?

It doesn't matter, just play the game while you can, and figure out how you want to play it. You'll probably be surprised to find you don't actually want to kill all the other players, and not because the programmer is constantly supervising you.