The 13th 90+ Metacritic game is: Geometry wars! 27 reviews, 90% average.

[WiiStation360]

Squilliam said:
@Sinha - Ikaraga and Puzzle quest are both good XBLA games with 28/33 reviews respectively.

Geometry Wars has 27 reviews, so its not that likely to fall under 90 at this point.

You never know.  It has an average of 90.2% right now.  One 4 of 5 review would make it 89.9%