They're side-scrolling brawlers, in the style of Streets of Rage, Final Fight, Alien vs Predator (The 90's arcade game), Double Dragon, etc. I've never played those ones, but it's a genre Capcom used to be brilliant at. Wikipedia says they're slightly more technical than most of the genre, but don't expect something unplayably complex or hard to grasp; these were originally designed as quarter-munchers.
If you were so inclined, you could get them running right now, on your PC, using MAME. But that's beyond the scope of this website.