Looking to create genres for my machine and undecided what is the best route to go down when it comes to games like Alien Storm etc. At the moment I have Beat em ups and Shoot em ups being the tricky part. When I think beat em ups it's games like Double Dragon and shoot em ups Raiden.
So games like that alongside street fighter etc seems a bit off

Don't want too many catagories but, any tips of how others have gone about it would be great