[quote name='Puffa469']its everything thats in the Jaguar game plus some extea content. So its even better than the Jaguar verison.[/QUOTE]
Disagree.
Tempest X3 in and of itself is a horrible horrible game. The visuals are far too bright and they obscure gameplay, making strategy virtually impossible.
Tempest 2000 is an unlockable, but it doesn't feel up to snuff with the Jag/Saturn versions. One of the main annoyances is that the artificial intelligence for the AI droid was completely changed, making it useless. Also, the game just "feels different", I can't really explain it.
That's answering your original question. Is it worth the $3 or $4 that you can buy it for? Yeah, definately. But if you have the means to play the original Jag version (without spending too much), it's the better version.