I know of some flash/browser games if you’re okay with them and know how to safely play them but otherwise, I know I’ve definitely played a lot of games like this but I’m struggling to remember them.

I haven’t played the steam version yet but I know that The Last Stand: Union City is pretty good. It was released on Steam in the Legacy Collection It plays almost like a 2D version of Fallout 3/NV but in a modern setting. I’ve personally been looking for more games like this but I have yet to find any.

I know it might not be what you are looking for but I know that Terraria plays like this. It starts with melee weapons but you can get ranged weapons and there is a lot of them.

If you are okay with top-down shooters, I’m also aware of a game called Empty Clip.

I’m also aware of some adult games but I don’t know if I can post those here.