Quote: Original post by KwizatzI've had people join me in the middle. Once you're done with the story, there is a second play-through that ups the difficulty, let's you start with your up-leveled character, and adds a smattering of new side-missions (I've noticed one or two "kill this sentry tower" type missions that I didn't play through the first time, and the first time through I earned the achievement for 100% mission completion). But other than that, there isn't much point to playing through the story. It is a lot of fun to play with others and hunt for loot though.
I read somewhere that if you wanted to get good loot you should start a multiplayer game and then play by your self, if someone joins you, great, if not, you get the good loot, thing is, on multiplayer you do whatever mission the host is on, so don't expect strangers to just join you in the middle of a game.
The difficulty, and thus the loot, scales with the number of players. I think 4 is the max. Starting a multiplayer game without having anyone else with you shouldn't cause the difficulty to upscale at all. Even in single player, by the time I was finished with story, I had all gold weapons.
One thing that I think is great about the game is that I can have friends over who aren't very good at games, they can host a split-screen session so it starts from the beginning, and I can jump in with my up-leveled character to help them out whenever they need it. If the game gets slow, I can mow down a bunch of baddies way outside their level range really quickly and bump them up a level, as all experience and money is shared. I'll collect weapons that I won't use or sell just to give to a friend. It's definitely a neat little outcome to the whole social aspect for the game.