D.A.: Pursuit of Justice - The Rat Tattoo Murder is a law simulation game where players assume the role of an Assistant District Attorney in California. The case involves investigating the murder of Tommy Wu following a confrontation between rival gangs at a pool hall, determining whether his death was accidental or premeditated. Players gather evidence by visiting the police station to review witness statements, examining physical evidence, and ordering lab analyses at the crime lab. The game features a notebook computer interface that provides access to legal case studies and current legislation. Players use the Case Constructor tool to organize evidence and build their prosecution case for trial. Originally released separately on 3 CD-ROMs by Legacy Software, it was later bundled with two other cases before being re-released as a standalone title called Pursuit of Justice in 2001.