If you've somehow never gotten around to playing the Bioshock series, Amazon's making it exceptionally cheap to jump into Rapture and Columbia. From now through September 25th, you can pick up Windows-compatible digital downloads of Bioshock, Bioshock 2, and Bioshock Infinite for only $19.99. Amazon is also selling the individual games for half-price — but if your'e looking for the PC downloads, Bioshock Infinite is priced at $19.99 on its own, which means you can get the first two games for free. If you prefer to play on a console, the Xbox 360 and PS3 versions of Bioshock Infinite are on sale for $29.99.

All in all, regardless of what platform you play on or what games in the series you've checked out, there's a pretty cheap way to get into the series here. The first Bioshock still stands up as one of the best games of the last decade, and the latest entry is undoubtably a 2013 standout — if you haven't dipped into the series yet, this is a great way to kill the rest of your weekend and beyond.