Free Running Multiplayer Game Idea Thread

Hello i had a idea a week or so back about making a multiplayer free running game do you like this idea? Heres a list of features iam tempted to include can you please say if you like them

1. Grapling Hooks
2. Game show style obstacles
3. Rolling
4. Multiplayer using lan but can connect up through hamachi
5. 2-16 person multiplayer
6. Multiplayer only
7. 5 default levels
8. Mod support
9. 20-30 character models
10. First person view system

Just say the numbers of the ones you like please.