Interestingly enough, PC Magazine has reviewed the Xbox version of Halo, though it is an extremely short article:

If the Xbox has a killer app this is it. Halo is simply the best action game to surface since Half-Life was released for the PC in 1998. Stunning 3-D graphics, an epic sci-fi storyline and tense shoot-em-up action all make Halo a compelling and memorable game experience. Trapped on the artificial ring world of Halo, you must battle past waves of hostile aliens while trying to unravel the mystery of Halo.

PC Magazine scored Halo 5 out of 5. (Thanks HBO)