So basically at this point:
1. Xenoblade Chronicles 92% (and 86% on the re-release)
2. Xenogears 91%
3. Xenoblade Chronicles 2 85%
4. Xenoblade Chronicles X 84%
5. Xenosaga Episode 1 84%
6. Xenosaga Episode 3 83%
7. Xenosaga Episode 2 74%
http://www.gamerankings.com/browse.html?search=Xeno&numrev=3&site=
Given that critics are usually pretty harsh with this series since it is more niche than other games (as in it appeals very strongly to a specific subset of gamers, and we can hardly comprehend the lower scores) an 85% is probably more like a 91-94% for us. But who knows, we'll see.
Xenogears, in particular, is kind of like Earthbound, it doesn't appeal to everyone, but for those it does, the game is a 98-99%.
Xenoblade Chronicles 2 has similar critical patterns to Xenoblade Chronicles X, there are wildly different review scores. In this case, everywhere from 70% to 95%. Xenoblade Chronicles X had 50% to 96% (actually many sources gave it 95 and 96, but it got dragged down by the troll scores).
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