Today, the "Rainbow Six: Xeno" media rating was officially lifted, as of press time, M station average score of 72 points, 11 media, 5 gave praise, 6 gave a good review. Among them, IGN gives a 7-point evaluation for this game.

Specific media scoring aspects:
IGN gives a 7-point mid-score: Rainbow Six: Xenotrope brings some great new ideas to this well-respected first-person shooter, but it doesn't stand out on its own. It's more of a generous, well-made expansion pack than a brand new game.
PC Gamer gives a 73-point mid-score: Rainbow Six: Xenomorph is a fun and normal co-op shooter.
NME gives 80 percent positive reviews: Rainbow Six: Xenomorph is compact and fun, and it's an excellent recombinant of the multiplayer game Rainbow Six Siege. Like many games of its kind, Rainbow Six: Xenomorph can be fun if you have friends.
Other Media Ratings:
COGconnected gave it an 84-point positive rating
Dexerto gave it an 80-point rating
EGM gave a mid-60 rating
VG247 gives a mid-rating of 60