Of the 300+ anime I've watched, this is my personal top selection - the majority of my favorite shows are action packed with dark themes. Start here if you're looking for amazing recommendations!
These anime feature mainly slice of life comedy, they are quite light-hearted and have some great characters.
A 'game' with serious consequences where the stakes and the rules may be agreed upon by parties involved, or imposed on them by an external force; either way, not following them will usually have severe consequences.