Scramble style: All correct answers go through to the next round. If two answers are the same the first one in counts the other guesses again. You cannot change your mind first answer counts.
Digger's ruling is final.
Last man Standing wins or until list is exhausted.
Thunderdome: A topic is set, and your job is to name a correct answer. If you answer incorrectly, you're out! Simple as that. Topics can range from sports to geography to pop culture, anything you can think of you can have a topic. You can either do it list form (everyone answers in order) or scramble style (everyone answers at once, you go again if your answer was crossposted). (example: here)