Yeah, think "The Money Hunger Games". Except, no alliances. It's every man for himself, survival of the fittest.
1. You know how in the movie people had sponsors giving gifts? Let's give roll with that but with our spin on it. Instead of people giving gifts we get a list of everybody who wants to play and then randomly assign them boosts in games/activities of certain types. So and so gets a 5% boost from whatever they earn in Jeopardy, x gets 5% on top of what they made from bets etc.
2. To simulate the players gathering resources in the movie, there will be a first week cease fire so the game isn't immediately chaotic
3. Robberies won't be a thing
4. Robberies will be replaced with kills and they're final, once you die you're out of ABW Hunger Games for the duration of the game
5. You can't kill without acquiring a weapon
6. There will be a certain amount of weapons each of varying quality that will determine how successful an attack will be
7. There will armor to buy to lower your chances of dying from an attack, a success defense depletes the armor and the user will need to buy another
8. A Successful or unsuccessful kill will break the weapon and the user will need to purchase another
9. Last man standing gets the "VICTOR" badge/title and a certain amount of money yet to be determined
Off the top of my head, I got more stuff for the robbery system in general but Du talkin about he too stressed.