The Babylon Project is independent of the d20 System RPGs of similar name. The system uses two D6, one red (positive), one green (negative) for most resolutions. Snake eyes (1,1) causes a "setback" and box cars (6,6) provides a "benefit". Task resolution is ability modified by the die roll against a difficulty level target number.
Combat uses a scatter system against a silhouette to determine actual hit locations.