Brilliant, classic, ancient, arcade beat em up game remade for PC. I absolutely love the fact that they've reworked the original game quite a bit and even added Online Coop feature. You can host or look for games, join others drop-in style or from the beginning if you like. Lag can be a bit of a problem but they've also added a ping limiter apparently so you can filter out the people outside your area and whatnot.
Controls can be a bit messy until you get used to it, it takes a while to get used to even for a beat em up game. Another thing that bugged me was how they left the magic as it was, it looks fantastic when you're playing alone or in an arcade game place but not online when it pauses the game for everyone for about 3-4 seconds to watch the special effects, they'll have to sort it out asap.
The game itself seemed a bit sandbox-ish, at least for a 2D sidescrolling game, there's quite a bit of exploration and looting, and you can do certain combo moves as you attack, not to mention you do all these with 3 other actual players. The inventory is stacked and divided to 2-3 parts, you can choose to use magic or throwing weapons or simply potions and various items instead. When you die, you can just respawn right away at the cost of your "score".
It's definitely worth a look if you've got friends to play with and definitely worth the price if you ask me.