http://shoryuken.com/2013/07/30/major-tournaments-agree-to-rules-standardization-on-player-collusion-event-coverage-determined-by-rule-inclusion-and-enforcement/
Recently there was a video game tournament, http://www.thevideoxgames.com/, where some people believe that the two participants in the Grand Finals of http://en.wikipedia.org/wiki/Ultimate_Marvel_vs._Capcom_3 under performed and worked in collusion with each other to split the winnings. The reason some people believe there was collusion was because the two players did not play with characters they usually use in the finals of tournaments.
The two participants of in the Grand Finals of UMVC3 were http://www.youtube.com/results?search_query=NYChrisG&oq=NYChrisG&gs_l=youtube.3..0l8j0i5.597.2129.0.2442.8.8.0.0.0.0.98.555.8.8.0...0.0...1ac.1.11.youtube.GDpUabLv65Y and http://www.youtube.com/results?search_query=EMP+Flocker&oq=EMP+Flocker&gs_l=youtube.3..0.1257.1896.0.2106.2.2.0.0.0.0.88.142.2.2.0...0.0...1ac.1.11.youtube.FXwrMpWlHe4.
EMP Flocker was the winner of the recent EVO 2013 game tournament http://en.wikipedia.org/wiki/Evolution_Championship_Series#Evo_2013 and AGE NYChrisG was regarded as the strongest player going in to the UMVC3 EVO 2013 tournament by last years EVO 2013 UMVC3 winner. http://www.eventhubs.com/news/2013/jul/14/filipino-champ-while-chrisg-most-dominant-player-i-will-win-evo-year-interviews-pr-balrog-and-more/
https://www.youtube.com/watch?v=m72x9sjShG0
http://www.youtube.com/watch?v=Q8hv6IGQSkI
You can see that the characters that EMP Flocker uses in the UMVC3 VxG 2013 Grand Finals are different from what he used at the UMVC3 EVO 2013 Grand Finals. This difference in character use caused suspicion of collusion.
Collusion is not new. http://www.youtube.com/results?search_query=Justin+Wong&oq=Justin+Wong&gs_l=youtube.3..0l10.858.1983.0.2081.11.8.0.3.3.0.73.351.8.8.0...0.0...1ac.1.11.youtube.5vFpLrLxwN4, a professional gamer, talks about participating in pot splitting with http://www.youtube.com/results?search_query=WolfKrone&oq=WolfKrone&gs_l=youtube.3..0l10.4055.5175.0.5265.9.7.0.2.2.0.87.481.7.7.0...0.0...1ac.1.11.youtube.niFz3-U91Vc, also a professional gamer.
http://www.youtube.com/watch?v=TfmRWTqPq3A
https://www.youtube.com/watch?v=5y1jbYOYhqs
What do you guys think about Collusion and Pot Splitting?