List of Xbox System Link games

This is a list of original Xbox games that are compatible with the System Link feature, both released and unreleased. Platinum Hits releases may not system link with non-platinum hits releases due to some Platinum Hits releases having 'Title Updates' that will not link with older versions, and some games will not link with non-updated versions if they have 'Title Updates' applied, either through XBL or a softmod.

Source: Wikipedia — List of Xbox System Link games (CC BY-SA 4.0)