Most Over and Underrated games

Overrated (IMO)
Halo 3 (Single player is not as good as halo 1 and the multi-player is not as good as halo 2)
Gears of War 2 (Multi-player is complete bullshit)
Killzone 2 (Great game, but not mindblowing gameplay)
Gran Turismo 4 (my least favorite in the series)
Super Smash Brothers Brawl (Melee was somehow just better)
Brothers in Arms Road to hill 30 (Its a good game but there so many times where i just want to throw the controller at the tv)

Underrated (IMO)
Test Drive (2002) (it was just a simple fun arcade game)
Crackdown (Super hero powers were just awesome)
The Godfather II (I think that this was one of the better movie licensed games)
Battle Field 2 Modern Combat (Yeah it wasn't like the PC version at all, but, it was still a really fun game)
Goldeneye Rouge Agent (Its not the best FPS ever, but, i think its far from garbage)
Call of Duty 3 (COD2 was a better game, doesn't mean COD3 sucks)
Timesplitters Series (All of them dissevered better ratings)

What games do you think need more or less praise

I definitely agree with Godfather 2, i had a lot of fun with it despite its problems.

Borderland is completely overrated in my opinion.

New users seriously need stop making these type of threads.

"Overrated (IMO)Halo 3 (Single player is not as good as halo 1 and the multi-player is not as good as halo 2)Gears of War 2 (Multi-player is complete bullshit)Killzone 2 (Great game, but not mindblowing gameplay)Gran Turismo 4 (my least favorite in the series)Super Smash Brothers Brawl (Melee was somehow just better)Brothers in Arms Road to hill 30 (Its a good game but there so many times where i just want to throw the controller at the tv)Underrated (IMO)Test Drive (2002) (it was just a simple fun arcade game)Crackdown (Super hero powers were just awesome)The Godfather II (I think that this was one of the better movie licensed games)Battle Field 2 Modern Combat (Yeah it wasn't like the PC version at all, but, it was still a really fun game)Goldeneye Rouge Agent (Its not the best FPS ever, but, i think its far from garbage)Call of Duty 3 (COD2 was a better game, doesn't mean COD3 sucks)Timesplitters Series (All of them dissevered better ratings)What games do you think need more or less praise "

Hey look at me! I hate on all the popular games! I'm SOOOO cool.

" Borderland is completely overrated in my opinion. "

Halo 1's single player had a lot of those modular mazes that took forever, and the ending was more like an arcade sequence than anything the gameplay was leading up to.  I felt the single player in Halo 2 was much improved, but maybe that's the prevailing opinion?  I dunno.

I kinda agree with Killzone 2.  I personally didn't see what the big deal was.

Probably gonna get some hate for this one.. ("I hate all the cool games, I'm so cool") MW2 is definitely overrated, in my opinion. And I'll have to agree with Crackdown and Timesplitters being underrated.

Both Uncharted games are overrated. 
And I agree that COD3 is better than most people give it credit for.

" New users seriously need stop making these type of threads. "

Halo, MW2, GTA, Any game that has gotten a 10/10 that has gotten it in the last decade. except for shadow of the colossus
 
Psychonoughts, Shadow of the colossus, Psi-Ops, Beyond good and evil, Ico 
 
Ico and Colossus were some of my most poignant experiences in gaming.      

" Psi-Ops "

I think Crackdown was also underrated. It was a fun game.
 
I wanna add Majesty 2 to underrated games as well. Not many people know about it.

"Borderland is completely overrated in my opinion. "

GTA IV: The Ballad of Gay Tony, solely based on Ryan's very disappointing review. That game is a classic and will be remembered for quite some time as a high point in the GTA series.

" Hey look at me! I hate on all the popular games! I'm SOOOO cool. "

These threads never turn out well... but whatever the GOW series is completely overrated.

+1 for Nuts & Bolts being underrated.  It hugely deviated from the standard Banjo formula, but was still very amusing, a lot of fun to play, VERY challenging and has some of the best graphics on the system.  One of the best games released this generation, in my opinion.
 
I'd also add MGS4 to being totally overrated.  I enjoyed it, for the most part, but don't agree with the praise people lavish on it.  The first few chapters don't really seem to be going anywhere and exist purely to take up time before the end, where the actual story really kicks in.  Too many silly cameos by older characters popping up every few seconds, and almost every discrepancy was explained away with "nanomachines".  The last two chapters, and the last boss fight and ending inparticular will be remembered by me as some of the best in any game ever, but generally speaking, I thought the game was very underwhelming compared to the third, which is still better in almost every way.
 
However, I think the most important thing to remember is that just because you may not like the game, does not make it overrated.

I don't think Crackdown is underrated.  Underrated games usually don't get sequels and they certainly aren't among the most talked about previews at an E3 convention.  
 
Underrated in my book is Metal Arms: A Glitch in the System.  A fun platform/action game from the previous generation.  Last I heard, developers weren't sure who owned the IP these days after the company was swallowed by Blizzard to finish Starcraft: Ghost.  That didn't go well and they faded out of prominence.  
 
I don't know what "overrated" is since I find it hard to discredit anyone for liking a particular game or franchise.  But, if I had to choose, Resident Evil because I don't like the controls in those games. 

" @LiquidSwords said:

" New users seriously need stop making these type of threads. "

Yeah, we should continue to make threads about box art and camping in MW2. Those are so much better.  "

I can't name underrated, but certainly underappreciated: most of the games I play.

TimeShift was an underrated game. It had cool features, and I really enjoyed it. 
Bionic Commando is also an underrated game. Imo the controls were nearly perfect.
I know I'm going to get some hate for this one, but w/e. Kane & Lynch: Dead Men. That game wasn't imo bad. It had some flaws, but overall it's a enjoyable game.

" Borderland is completely overrated in my opinion. "

Darkness is the most underrated game of this gen 
Escape From Butcher Bay was of last gen. 
 
They reviewed well, but just not fondly remembered enough.

" Darkness is the most underrated game of this gen"

Saints Row 2 deserved way more praise just for how it nailed open world co-op.  Everything worked; the character creation, all of the missions, the secondaries, the cutscenes.   They practically said "This is possible and here's exactly how you should do it.", and nobody paid any attention, unfortunately.

" Banjo Kazooie Nuts and bolts is absolutely fantastic but was destined to fail with an artstyle like that on the 360...although I dont know if it was all that underrated I rememember it getting a lot of good reviews...  Bionic Commando (the new one)... Absolutely love this game, moreso than say assassins creed 2 or Batman (liked both of them too)... I just didn't get a lot of the complaints people had with the game like it not being open world (it would be a worse game if it was) the swinging is great, there is some really good bosses an awesome soundtrack and  it works because of its gameyness. "

" @marioncobretti said:

" Banjo Kazooie Nuts and bolts is absolutely fantastic but was destined to fail with an artstyle like that on the 360...although I dont know if it was all that underrated I rememember it getting a lot of good reviews...  Bionic Commando (the new one)... Absolutely love this game, moreso than say assassins creed 2 or Batman (liked both of them too)... I just didn't get a lot of the complaints people had with the game like it not being open world (it would be a worse game if it was) the swinging is great, there is some really good bosses an awesome soundtrack and  it works because of its gameyness. "

I will tell you what is wrong with that game I really wanted to like it I really did but it funneled you everywhere there was no way to go anywhere but RIGHT where the game was designed to put you and if god forbid you got caught in the "fallout" you were screwed because you die in 1 second, it had some good ideas and it looked pretty good in spots but the way the world was designed just completely ruined it for me, nothing to do with it being open world I just like to be able to move around just a little bit. "

" Darkness is the most underrated game of this gen Escape From Butcher Bay was of last gen.  They reviewed well, but just not fondly remembered enough. "

" TimeShift was an underrated game. It had cool features, and I really enjoyed it. 

Underrated: 
The Darkness 
TimeShift 
Kane & Lynch: Dead Men  
Medal of Honor Airborne  
Black 
 
Overrated: 
LEGO Batman 
GT5 Prologue 
Saints Row 2 
Shadow of the Colossus