I Really Want to Get Into Rougelites

Hi, I really want to get into rougelites but don't know where to start. I keep seeing mobile game adds that look like fun rougelites with upgrading guns and getting new characters mid-level. But they're fake ads where that gameplay style is like 5% of the total game. Are there anything real games like that?
I'd prefer a 2D top down shooter. That might be too vague, but does anyone have recommendations?