Since my last thread on this was locked for unjust reasons before I could make my next reply, I'm continuing the discussion with a new thread.
Anyway, as the title says, Aliens: Colonial Marines should be listed as canon on this wiki. You can see my main arguments for that in the other thread I made (as long as it doesn't get deleted) so I won't rehash them here. But beyond the arguments I've already made, I would also say it should be listed as canon according to this wiki's own policy on what is or is not considered canon. Here are the relevant quotes from the Xenopedia:Canon page and my reasoning as to why they apply:
"Ultimately, the final word on what is part of canon rests with 20th Century Fox."
As this quote says, Fox (and Disney, since they own Fox now) has the final word. The last official statement on the matter of whether or not the game is canon was back when the game was released. And that statement said the game is canon. No official statement from either Fox or Disney since then has contradicted that, so it is entirely reasonable to assume the original statement of the game being canon still stands.
"Likewise, some media from lower tiers has been conclusively confirmed as canon by Fox, despite the fact it contradicts the theatrical film series, as is notably the case with Aliens: Colonial Marines."
Not only does this quote specifically mention Aliens: Colonial Marines as being "conclusively confirmed as canon", it also opens the door for materials that openly contradict the films to still be considered canon. Especially when we couple this quote with the previous one about Fox having the final say on what is or is not canon.