Procedural Stuff:
1. Please respect the arena. Each area has its own pros and cons and it has been designed the way it is for a reason, so don't change things around just to fit what you need in your post. I think that goes without saying.
2. If you need something from another area of the arena, you will have to travel there. If you have to travel through another area of the arena to get there, then stop there and allow others the opportunity to post. Travelling from the northern tip to the southern tip is a 40 mile journey, it's not only going to take 20 minutes so by having your character walk from the northern arena to the southern arena all in one post will force a timeskip and other characters may currently be involved in their own important real time things.
2. Characters are potentially going to die in this game. If you leave your character open and someone else who was hiding manages to take your character out, there are no redos*.
3. In that vein, you can only kill another character if there is a realistic opportunity to do so. So to say, if one character decides to take a chance and run across an open field in the south arena, another character who was in the north arena cannot somehow make it to the south arena and kill the other character all in one post. If one character has an opportunity to kill another but no weapon, he cannot suddenly find a ready-made knife lying a couple feet away.
4. Rules on combat system pending.
* There are some people who have expressed a wish that their main characters do not die. If you want to challenge a person who's expressed this wish then please respect it. These characters can only be gravely wounded at most. If you've elected to immortalise your character, then please be aware that he'll have the opportunity to save himself and recover but will still die if he/anyone else is unable to provide help.