Originally Posted by
Nemesis
The multi player was quite fun for me. It's not fast paced though, and team work is essential. The first time I joined a game I got my ass handed to me while running and gunning. You have to complete both the Firefly & Hunter journeys for the two trophies to complete the platinum. There are other multiplayer trophies as well, but they don't count towards the plat. You should get most of them during your journey though.
Tip : All difficulties are unlocked from the word go, so don't start on easy/normal, but rather hard (or survivor/grounded if you're a freak). It's really not that more difficult on the harder levels, just less of everything. And during the tough sections, the game does tend to give you what you need, and if used right, it should be more than enough.