MM, there are lots of possibilities for what REOnline could be. Here are some things that I\'ve thought of.
1. They could just have it be 1-4 players, and you can all go through the game co-op. Of course they should vamp up the difficulty if you\'re playing with multiple players. I\'ve been wanting a multiplayer RE game ever since the first, and if this turns out to be it, then it\'s a definate purchase. And maybe if it\'s only from 1-4 players, it can either be played on one PS2 with your friends, or online with other people around the world.
2. When you join an online game, you can choose what you want to be, a bad guy (zombie, dog, boss, etc), who can choose where you want to start in the game, or a good guy, who can either start at the beginning, or join up with a group of people. Then the game should still be played the same, the good guys need to get to the end of the game without losing, but real life players controlling the bad guys are trying to stop them. The bad guys can go from room to room hunting down people who are trying to make it through the game, or they could set up traps with multiple guys in one area waiting for their victims. The good can go through the game either alone, or with a group of people trying anything to stay alive. Now you may think, "wow, that sounds boring. If you are like the end boss or something, you will be waiting for hours just for someone to come." But because there can be multiple groups of players trying to make it through the game at once, you will almost always be fighting people. And you can team up with some normal bad guys (so it\'s a group of normal bad guys and a big bad guy could be hunting down victims together.

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And doing this, you could set up competitions like, "see if you can get through this area of the game without dying," and the first person who does it is the winner. One person (or a group of people) would try to get through, while everyone else would be the back guys trying to stop them. Then when the good guys die, they would be the bad guys and new people would get a chance to try and make it through.
Of course there would have to be a lot of balancing and tweaking for all that to work, but I think it would be pretty fun if they got it to work how I am picturing it.
Capcom has probably thought of tons of other ideas of how to put it online too. It will be interesting to see how the final version turns out.