Steam's "Midweek Madness" sale includes Blur for 75% off ($5) and the X series titles for 50% off.
X SuperBox (containing the full catalog of games) now costs $19.99, the X3: Terran War Pack (including Albion Prelude and Terran Conflict) runs for $9.99, and X3: GoldBox (featuring the aforementioned games plus Reunion) is priced at $12.49.
The next game in the series, X Rebirth, is scheduled for this year.
Take advantage of these deals while you can—the clock is ticking down fast.
Follow @wita on Twitter for tales of superheroes, plumbers in overalls, and literary adventures.