Do you know an unbiased video-game review?

Unbiased review:

"This is a video game that exists. The video game is for a video game console. The video game is played with a controller. The video game has graphics and sound. The MSRP of this video game is $59.99. Here is a picture of the video game's cover."

Pretty much anything beyond that is opinion. :)

Try ACG (Angry Centaur Gaming) on YouTube. He gives really in depth reviews, breaking games down by graphics, sound, gameplay etc, as well as giving a rating system which is the only one worth having: Buy, wait for sale, rent or never touch. None of this 7/10 business, just is the game worth your time and money

There is no such thing.

Every reviewer is human and every human is subject to bias, even if they claim that they aren't.