You maybe going back to Serious Sam after playing Serious Sam 2.
Graphics: Certainly are good, but not great. The engine wasn't as amazing as the first engine used for Serious Sam.
Sound: This is probley the best part of the game. Honestly, the voice over is great forever character. The sounds are funny and some jokes are executed well; others, fail horribley.
Value: The single player is worth a look the first time around, but there's nothing that brings the player to want to beat the game a second time around. The only reason why I could see someone actually wanting to play the campain is over Xbox Live, but it still doesn't seem any better.
Tilt: I'm tilting this slightly down due to the lack of innovation and gameplay elements that made the first game great. In fact, I picked back up the first game and started playing it again with my buddies and it leaves Serious Sam 2 in the dust (and it should be the opposite). Not only that, but they left out the Final Boss from the PC version, yet the Xbox version is being sold for more money.