CC Space Trek

The main goal is to clear the galaxy of Klingons. This features good sound effects and even some low resolution animations (of a Klingon ship being destroyed, for instance. Like others, it features a number of single digit numeric commands (and sub-commands for things like using the ship's computer). The direction of the ship and photon torpedoes is done with numeric values (and both warp drive and impulse engines are done from the same Set Course command, which is different than some other versions).

One nice thing about this version is that since it is real time, each time you hit a command key, it displays what that key means on the right side, and doesn't commit to that command until the player hits ENTER (so it is a version of built in help). This extends to figuring out directions as well.