The "substance" is nothing more or less than a collection of disconnected additions to the core game Sons of Liberty, which remains unchanged from its original release: you play as Solid Snake in stealthy espionage/assault missions, infiltrating the lairs of bad guys to take down nuclear-powered bipedal creations called Metal Gears. Snake has all kinds of tricks up his sleeves: high tech weapons, the ability to sneak around undetected--he can even flip over the side of a railing to hide (a "Grip Meter" counts down, increasing the tension and making you pray the enemy walks away). Both a boon and a detriment to the game is its reliance on cinematic scenes to further the convoluted plot. They're well-rendered and professionally done, but you'll seemingly find yourself spending more time watching the game than playing it.

Substance is worthwhile for anyone who doesn't already own Sons of Liberty. That goes double for Xbox and GameCube fans, because the game looks much better on those consoles than it did on PS2. For those who've already played the original, this reissue just doesn't add enough, pardon me, substance, to merit purchasing it again. --Bob Andrews

Pros:

• New modes and missions
• Graphics improvements on Xbox and GameCube
• Skateboard mode on PS2

• New content too sparse for players who already have the original game.