Released 1989

From Wikipedia: "Mean Streets is the first game in the Tex Murphy series. Unlike later games in the series, it features segments in a variety of genres, including adventure game sequences, side-scrolling action sequences, and an open-world flight simulator. It was notable at the time as one of the first commercially available games to use 256-color VGA graphics, as well as for its "RealSound" technology that allowed recorded digital audio to be played back without the need for an external sound card."

Released 1991

From Wikipedia: "Martian Memorandum continues the Tex Murphy storyline, but features more traditional point-and-click adventure gameplay, with inventory-based puzzles and branching dialog trees. It uses digitized actors and features short bits of video during conversation, hinting at the FMV style employed in later games."

Released 1994

From Wikipedia: "Under a Killing Moon marked a change in direction for the series. Costing over two-million dollars and four years of development, it used 3D graphics and full motion video to greatly expand both the gameplay and presentation. Aaron Conners was put in charge of writing duties for the first time, and he re-imagined the Tex character as a down-on-his-luck divorcee, struggling to find work as a private investigator. It featured real-time 3D graphics that were exceptionally detailed at the time, and was one of the first games to take advantage of systems with 16 megabytes of RAM in order to display higher resolution textures."

Released 1996

From Wikipedia: "The Pandora Directive is the direct sequel to Under a Killing Moon. It uses the same engine as its predecessor, and features many of the same locations (some newly expanded), particularly on Tex's home street of Chandler Ave. It also features many recurring characters from the previous game, and continues the romantic plot between Tex and Chelsee Bando. It features very similar gameplay to Under a Killing Moon but introduces logic puzzles alongside the inventory and "jigsaw" puzzles of the previous game. It also features a branching storyline, with three main paths and seven unique endings, and allows for multiple solutions to some problems, particularly those involving money."

Released 1998

From Wikipedia: "Overseer is the fifth game in the series, but its story is largely a re-telling of Tex's first big case, previously portrayed in Mean Streets. This story is told through the use of a frame narrative, set after the events of The Pandora Directive, as Tex relates the story of his past to Chelsee. Overseer maintains the gameplay and presentation style of the previous two games, and borrows little from Mean Streets beyond its basic plot. It retcons many details from that game further sharpening the divide between the early games in the series and the live-action games. Overseer was developed to showcase the nascent DVD-ROM format, and was the first game developed to specifically take advantage of DVD. Produced on an accelerated schedule, it was somewhat more limited in scope than The Pandora Directive, without the branching paths and multiple endings. Access hoped that Overseer would serve to set up a proper sequel to Pandora and ended the game on a cliffhanger that remained unresolved for over 15 years."

Released 2014

From Wikipedia: "Tesla Effect is the sixth game in the series, and a true sequel to The Pandora Directive. It continues in the style of the previous titles, making heavy use of live-action FMV, as well as first-person exploration and investigation of 3D environments. It once again returns the series to Chandler Ave and features many of the same characters and locations featured in Under a Killing Moon and The Pandora Directive. It also features multiple paths and endings like Pandora."