Those competing in Season 4 of Riot's League of Legends Championship Series (LCS) are not allowed to stream a number of titles from titles that may be deemed "competition" to League of Legends. This applies during the length of the contract term and also includes periods of off time for all individuals. Yes, it's essentially "you stream League of Legends" or nothing at all.

onGamers has confirmed with the team representatives that LCS players are disallowed from streaming the games listed below outright, not just when adjacent to a League of Legends stream. Under Section 3 Rule 4 of the new contract handling 'Non-League Events and Streaming', it states that "... the [LCS] Team shall ensure that, during the Term of this Agreement, its Team Members do not publicly stream gameplay of the titles set forth on Exhibit B". Exhibit B states "the specific restrictions on streaming are set forth in the Sponsorship and Streaming Restricted List, as updated by the League from time to time", which is the document listed below.

As you can see in a copy of the document terms above, some of the games include Valve's Dota 2, Blizzard titles that include Diablo, StarCraft, and Hearthstone. Heroes of Newerth is naturally out of the question. There are also some questionable titles on there including World of Tanks and Fat Princess. Seriously?

Riot has not issued any comment on this decision to lock their series players into this highly restrictive streaming limitations.