Steam's Summer Sale isn't the only promotional game in town, as Humble is running a weekend discount on the Batman: Arkham series to celebrate the impending launch of Batman: Arkham Knight.

Check Out Today's Steam Summer Sale PC Deals

The newest title in the series is set to launch on Tuesday, June 23, but Humble is giving players a chance to purchase all the past titles for cheap. If you're a fan who doesn't own the games or missed a title along the way, or if you're someone who never had a chance to try the series at all it won't likely get any cheaper than this.

Batman: Arkham Asylum and Batman: Arkham City are both 75 percent off for just $4.99 each. Both titles are the Game of the Year Editions, as well, giving players more content and the definitive versions of each title, to boot. Batman: Arkham Origins--the only game in the series not developed by creators Rocksteady Studios--is also 75 percent off for $4.99.

Watch The Debut Trailer For The Highly-Anticipated Final Fantasy VII Remake

The upcoming title is not left out of the discounts either, though only if you purchase the Premium Edition for 10 percent off. Batman: Arkham Knight will be the last game Rocksteady is developing, according to the studio itself, but it remains to be seen if that still means more games will come. Another studio will probably take on the lucrative and popular IP, but that's undecided for now. Arkham Knight has received near universal critical acclaim so far, as the reviews posted today have shown.

Tags: Batman: Arkham Knight