A port of the DOS shoot-em-up Tyrian (source files)
OpenTyrian is an arcade-style vertical scrolling shooter. The story is set in the year 20,031 where you play as Trent Hawkins, a skilled fighter-pilot employed to fight Microsol and save the galaxy. February 2007 the Pascal source code for Tyrian was licensed for a small group of developers to re-write it in C, in a project named OpenTyrian, licensed under the GNU General Public License. Following that announcement, in April 2007 Daniel Cook announced the free availability of his Tyrian artwork under generic liberal terms.