Let's have people post submissions for the prize as a reply on this topic. In fact, let's make that a requirement. A link to another topic in the reply is fine, but no changes to the submission once the reply is made on this topic. Submissions will be taken in order, thus if there are multiple entries, the first one to reply on this topic with a winning entry will be the winner (though if there are multiple, unrelated winning submissions with a few days of each other, I will consider awarding multiple prizes).
If we need a besatiary/zerbot topic area in general, I would be happy to create it.
I have no concerns regarding the honesty and integrity of everyone in this forum. A certain kind of natural selection is in operation.
I designate myself as the finial voice (this time) on inadvertant contamination or rules technicalities, though opinions from the peanut gallery will be given strong consideration. For example, Maca's Five-0 zerobots are descended from a first ancestor which contained a start and an end. While technically a violation of the rules (starting bots should be all 0's and nothing else) I deem descendents from this common ancestor to be elligable for the prize (this time).
Regarding default ZB environments, that is a complex subject which deserves it's own topic. In my opinion, it is possible to evolve winners using radically different environments and the environments themselves may need to be modified by the human during different breeding stages to provide new and different selection pressures as evolution proceeds. Thus, for the contest, any environment may be used and environments may be changed as deemed necessary along the way by the human subject to the rules above (in particular, any organism with hand authored DNA added to the sim as part of the enviroment must have mutations disabled).