It is also potentially the nastiest we shall play. In each round, Nature supplies some of its fruits, but only one player will receive the benefits of its generosity. The game decides who gets what, and there is only one winner. Each player must expend some resources in each round to stay alive. Nature matches these resources dollar for dollar, placing an amount equal to the total contributed in the central kitty.
Players then proceed to bid for the central kitty.
If they wish to raise a previous bid they must place the additional cash, corresponding to the increased bid, on the table. All bids go into the kitty, whether or not the bid is successful. The entire amount of the kitty is paid out to the player making the highest bid. Bids can only be made by individual players, and the kitty may only be paid out to an individual player. So, you can give money to a player for bidding, but if they win they are under no obligation to return any money to you.