There is almost infinite replay value due to the incredible amount of available coffins in the krypt (You can literally spend hours JUST opening coffins). This creates an incentive to play the arcade mode and complete Kampaign mode.
Hands down this is by far the best Mortal Kombat ever made and possibly the best fighter available for the GC. There is so much to this game, a deep and satisfying fighting system, new fatalities (although not enough), beautiful visuals and tons of goodies to unlock.
The small D-Pad dooms this game (as well as other fighters) from being a "Game of the Year" title... Pulling off these moves as well as combos, is the heart of any fighter and not doing so consistently nearly renders the game useless.
Unlike any other 3D fighters on the market. Midway has done an exceptional job of creating a brand new MK experience while still maintaining the old-school flavor that so many of us are familiar with. [Jan 2003, p.70]
Niggling problems such as overly cheap AI still persist, but for the most part, Mortal Kombat: Deadly Alliance manages to breathe new life into the gameplay while still retaining the Mortal Kombat feel.