GOG.com is offering up classic Interplay games based on Star Trek for the Mac, PC, and Linux, for $5.99 each.

If you're a retro-gamer hankering for a taste of the 1990s, make your way over to GOG.com and check out the new Star Trek games available for download. Two of them run on the Mac, Windows, and Linux, and one runs on Windows only. But at $5.99, you can pick and choose which you want.

Interplay announced Thursday the release of the games, including Star Trek 25th Anniversary, originally published in 1992, and its sequel, Star Trek: Judgement Rites, published in 1993. Both of those games are available for Mac, Linux and Windows. A third game, Star Trek: Starfleet Academy, is available for Windows. All games are DRM-free, so you can copy or archive them off your machine and not worry about having to activate them online.

The two multi-platform Star Trek games are point-and-click adventure games based on the original series. You man away teams on alien worlds and control the Enterprise's weapons, shields and communications during space missions.

Star Trek 25th Anniversary features the voice talents of the entire original Star Trek core cast of actors, including William Shatner, Leonard Nimoy, DeForest Kelley, James Doohan, George Takei, Walter Koenig and Nichelle Nichols. The musical score and sound effects are also derived from the original Star Trek television series.

Judgement Rites is a sequel featuring eight new "episodes" also featuring the original voice actors, sound effects and music. Starfleet Academy was originally published in 1997. It's a simulation game featuring full-motion video and 3D graphics, but it only runs on Windows.

Star Trek 25th Anniversary

Star Trek: Judgement Rites

Star Trek: Starfleet Academy