Another review states that OpenTyrian already includes the data files for Tyrian 2000. It is true that Tyrian 2000 has apparently been freeware since 2004. However, OpenTyrian currently uses the Tyrian 2.1 data, not the Tyrian 2000 (aka Tyrian 3) data. The version here includes more episodes. Thus, gog.com's donation is of bandwidth for hosting the game rather than the game content itself. This is is on-par with what they've done with other free content, like Beneath a Steel Sky. As for the game content itself...I certainly like it. It is a bit unfortunate that there really are certain weapon loadouts that are significantly-better and others that are significantly-worse; some configurations will probably never be used. However, this isn't particularly unusual to shmups that allow a lot of customization of one's ship. The game has quite a few secrets, and a sense of humor. As shmups go, Tyrian allows your ship to take multiple hits, and allows you to get screen-covering weapons. It allows for mouse control of the ship, which provides for a very responsive ship. I'd call Tyrian quite a bit easier (at least depending upon how one plays it) than many other games in the often-brutally-difficult shmup genre.
