The PS2 version has a bonus feature which allows players to purchase items at the end of each level by finding secrets. In the Xbox version a Secret Bonus is awarded after every level when all the secret areas for that level have been found. It also has several new equipable items and weapons as well as new enemies. The two player co-op mode is exclusive to Xbox and allows the second player to play as Agent One, altering the game in which he was never killed and played out the missions to the end. This allows for the story to support that Agent One either survived. Xbox version also has downloadable content, system link play and had online multiplayer via Xbox Live before Live play was disabled for original Xbox games. A Platinum Hits edition of the game was also released for the Xbox. The PlayStation 2 version does not support online multiplayer.