| Name | Reviewer | Quote | Score |
| RewiredMind.com (PlayStation 2) | Paul Taylor | Tony Hawk's Underground represents a significant improvement Over the previous game in every conceivable area. | 10 out of 10 |
| GameRaiders.com (GameCube) | Staff | While the game's Story mode could definitely have been focused on more heavily, Underground has a great gameplay model and adds a lot of fun twists on a great series | 92 out of 100 |
| ChicagoXbox.com (Xbox) | Staff | The addition of a real story mode is a Nice step up but is lacking. | 8.8 out of 10 |
| GameSpy.com (Xbox) | Bryn Williams | Neversoft continues to dominate the popular extreme Sports genre with a new take on skating. | 4.0 out of 5 |
| GameSpy.com (PlayStation 2) | Bryn Williams | Part of the brilliance of this game is the multitude of user-defined options and modes that exist. | 5 out of 5 |
| GameSpy.com (GameCube) | Bryn Williams | Tony Hawk's Pro Skater continues to be a video-game phenomenon. | 4.0 out of 5 |
| NetJak.com (PlayStation 2) | Steve Lubitz | ...Tony Hawk’s Underground certainly deserves at least a rental, if not an outright purchase, as long as you don’t expect it to completely Rock your socks off. | 8.6 out of 10 |
| ConsoleGold.com (Xbox) | Loren Halek | Little things are fixed, but no re-invention ever seems to come. | 88% |
| ConsoleGold.com (PlayStation 2) | Loren Halek | Tony Hawk's Underground as a game feels the same as its prior iterations. | 88% |
| GamersLogik.com (PlayStation 2) | Roger Gibson | THUG is the best game in the series to date, but not by a whole heck of a lot. | 8.9 out of 10 |
| 3DAvenue.com (PlayStation 2) | Simon Hutchinson | Overall Tony Hawk’s Underground is definitely the best in the franchise yet. | 90 out of 100 |
| GamingNexus.com (PlayStation 2) | Charlie Sinhaseni | Making the largest impact is the ability to get off of your board and walk around the environments. | 9.4 out of 10 |
| The Armchair Empire (PlayStation 2) | Tolen Dante | The new game is fascinating, but, for the first time, I found myself thinking back fondly to the previous Games in the series. | 9.0 out of 10 |
| WorthPlaying.com (PlayStation 2) | Staff | The heart of Tony Hawk Underground truly Lies in the single player mode, making the game into an adventure. | 9.0 out of 10 |