IGN gave it a 8.0
http://uk.wii.ign.com/articles/846/846970p2.html
Closing Comments
If you're thinking that Endless Ocean is an underwater action game, it's time to recalibrate your expectations. But don't lower them. Arika has created a very good, albeit different title that centers on the process of exploring the ocean and both seeing and cataloging its inhabitants. There is almost no way to lose (and the aquatic life is all safe, sharks included), but you will have fun all the same simply discovering new things, whether that encapsulates a humpback whale or a long-lost underwater civilization. You will also marvel at the serene locales and beautiful music the game employs. There are enough missions, from becoming a tour guide for other divers to photographing rare fish, to keep you busy for hours, but you might just prefer the pointless exploration to accomplishing set goals. Add in a two-player online mode and there's a lot to like about this scuba-diving simulation, even if some of its basic controls are wonky and its action-oriented scenarios limited. Did I mention it's only $29.99?
Another Take
from Mark Bozon
Endless Ocean was supposed to be my kind of game. Open world? Check. Quirky design that most cool gamers may not like? Check again. For whatever reason though, it just didnt grab me the first time I played it. It was simple, but a bit too simple.
Fast forward to our final review copies being delivered and I found a much different experience with the game. Yes its amazingly simple, barely even out of the sandbox design and into actual game standing, but it was also surprisingly compelling. I found myself wanting to explore new areas, wanting to grab a new piece of gear that I could show off while diving with friends via Wi-Fi, and wanting to get that perfect shot with the underwater camera. After a somewhat slow start, Endless Ocean really picks up not in the actual gameplay, but in its expansive, laid back design. Aside from some underwater trenches and the like that require specific gear, you really can go anywhere, and do anything right off the bat. All missions are optional, online worked without a single dropped frame, and the simple joy of exploring this vast underwater world was really very rewarding. Its far from perfect, but theres no denying its appeal just the same.
This one won me over.
8.0 Presentation
The majority of the game takes place underwater, whose presentation is beautiful. The on-boat stuff, on the other hand, is disappointing.
8.0 Graphics
Spectuaclar underwater graphics filled with moody lightning and animation. Lots to see and explore. On-boat graphics suffer, though.
8.0 Sound
Amazing underwater sound effects and music. Again, don't leave the water.
7.0 Gameplay
Some weird control choices, but they work, and the relaxed, go-at-your-own-pace play mechanics are a breath of fresh air.
7.0 Lasting Appeal
A fun single-player affair and a two-player online cooperative mode to boot. Plus, it's only $29.99.
8.0
Impressive OVERALL
(out of 10 / not an average)