There are definately bigger disappointments than some on the list.
I can't speak to all consoles but for PS3 the following have been disappointing IMHO:
1) Lair - very bad decision with motion control only linked with poor targeting = game thats too hard to master vs easy Wii motion control games. I still love the concept, and if they release it as a platinum title I'll give it a go with the patch, but this game simply did not live up to its promise.
2) Haze - oh free radical! Why? A generic FPS with a few gleams of gold and a whole mine full of average. I'm so gutted I'm speachless.
3) Assassin's Creed - why is it a disappointment despite the sales? Because they built a great engine, got the basic mechanics finished, then released it before actually making a full game. AC is simply a very weak game when you're not just free running around jumping on people for no reason and killing them. The plot is stretched horribly - the damn thing ends just as its beginning from a plot point of view. The mechanics are meaningless. You never need anything from your investigations. It's just go to three locations, perform three horribly basic acts (many taking 10 seconds) and then listen to the cut-scene.
4) Transformers - now this is something my kids got, and while watching them play it (and shaking my head sadly in a kind of uperior dad way) it actually occured to me that funnily enough the Transformers premise would (or rather could) make a good game - sadly cheap and nasty cash ins are obviously easier to make, and I guess I wan't expecting it to be different - but isn't it dissapointing that no effort was even made to make something good?
Heavenly Sword I didn't find dissapointing at all. Did what it said on the tin, had a clear if simple little story, and looked super. The only problem I saw was that it was hyped up to be more than it was designed to be. Great voice acting and cut scenes too.
I recently got UT3 on PS3 out of curiosity and have found it great fun. Again, it may not have reached sales hoped for but the basic game is solid, polished and runs great on the HW.
DMC4 I haven't played but my eldest son was a very happy customer and from reviews/sales again I don't see why it was dissappointing. It's not like they tried to be innovative. It was always going to be more of the same with better graphics and it delivered so what's to be dissappointed about?
The 360 games like Blue Dragon and LO I haven't played but obviously if their purpose was to give 360 momentum in Japan then they dissapointed. Both reviewed pretty well though so I'd assume the games themselves were okay. I guess the harsh reality is they are on a platform that could only limit their WW potential (not technically before 360 owners go apeshit, but because 360 simply doesn't have enough clout in WW jRPG marketplace - if they were good then WW they'd probably have sold more on Wii or PS3 - or PS2 for sure).
Try to be reasonable... its easier than you think...
