4A Games and Deep Silver have announced that they have sold more than 1.5 million Metro Redux games worldwide, which includes , which are available until April 17 at 50 percent off. If you already bought a copy of any Steam version of Metro Redux, you'll also receive a copy of the new Mac edition at no extra charge.

"We are thrilled with the performance of Metro Redux," Deep Silver executive Menno Van der Bil said. "4A Games have created one of the benchmarks by which other re-masters will be judged, and we have seen their efforts rewarded with fantastic critical and commercial success. Metro Redux has introduced many new fans to the series, and we look forward to reaching a whole new audience on Mac."

The Metro series is based on the Metro 2033 novel by Dmitry Glukhovsky.