The vast majority of information comes from an in-universe perspective, in violation of WP:FICT.
Although the article is not titled as a list, it still retains the basic organizational structure of a list - admitted to in its first sentence. There is little attempt to give an overview of the subject, instead, essentially, serving as a series of short mini-articles. This is not suitable for a good article - more breadth of focus is required, instead of a multitude of specificities.
The excess of fair use images is in violation of our image policies.
The individual profiles lack context - this article seems to not make any sense to someone who doesn't already know a fair deal about Halo. Compare to an article like Spoo, which is on an extremely specific fictional topic, but remains accessible to a non-expert reader.
