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It's an interesting move to release the game two weeks before the show starts. In my opinion, the whole franchise would have benefited from releasing the show first to build some lore and allow players to get an idea of what's actually happening in the world.
On top of that, I think the ratings on the first couple of episodes would be much higher as most potential players would want to check it out prior to being able to play the game. Not to mention pre-orders / launch-day purchase increases from viewers new to the game / franchise.
If the game isn't what many hope for at launch and players lose interest quickly, SyFy stands to lose quite a chunk of viewers before the show even premiers.