Picks up where Encounter:Colony leaves off. Your job is to clean out a Pfhor ship with the help of some crack marines. Requires Enter the Marines shapes patch (included). Not all that hard, unfortunately...
Another scenario by the creator of Luna West. This one has some pretty serious bugs... I almost didn't put it up, but I figured if enough folks emailed the author, they might get fixed. Worth a look, anyway... Non-linear.