: Better graphics, harder, Judy Nails is hot, a lot more songs, more downloadable songs, online play is awesome The Bad
: It's TOO hard, not as good cover songs as previous installments, doesn't do anything really new, GHII songs are compatible, boss battles rely on luck
GHIII is the same as GHII yet we get online play (which is just as awesome as you'd think) and tons more songs yet it is probably the most disappointing GH when it comes to cover songs. You get songs like One, Number of the Beast, School's Out, Cult of Personality and more, but they aren't show stoppers like in GHI and II. GHIII, however, has the best song list for more indie music and lesser known covers like My Curse, Stricken, Before I Forget, Through Fire and Flames, Prayer for the Refugee and more.
This is also the first GH to be IMPOSSIBLE TO BEAT! While the game is hard enough on Hard good luck beating the last few sets on Expert. It'll take you months to master these songs if at all. Through Fire in Flames is probably impossible for most GH buffs on Medium or Hard. Luckily, after hours upon hours of practice, I BARELY scraped through the song on Expert.
Some new features are the updated graphics...they're finally next-gen! The game has great physics with bouncing and swaying clothes, high-def textures so denim looks like denim. The characters also get more of a sexual upgrade (thanks Neversoft!) Judy Nails is as hot as ever yet they left out Pandora and added a preppy Japanese chick. There are a few great new characters like Slash, Tom Morrello, and Zeus the Rock God. Speaking of Slash and Tom you now get boss battles. These don't play out like you think. The first few are easy, but the last one, playing Devil Went Down to Georgia, is just pure luck. You have to hit sequences like when you get Star Power but instead you get weapons. These include breaking your string (you have to press a button really fast), raising the difficulty, blowing your amp (all the buttons flash on screen) or doubling the notes. This is fun, but some may NEVER beat it on Expert.
Minus all of that you can now play a Co-Op Career which is really fun as well and is pretty self explanatory. Overall GHIII is more for indie and lesser known band fans. If you want famous songs then you're out of luck. Thankfully the game has lots of downloadable songs now. I just wish the GHII songs were compatible.