If you somehow missed 2012 shooter Spec Ops: The Line, and happen to have a reasonably powerful Mac, why not check out the freshly-released OS-X version?
The port was developed by Digital Tribe Games, and goes for $30 on the Mac App Store. System requirements are below.
Spec Ops: The Line passed many a gamer by, as its dreadful tacked-on multiplayer gave it something of a bad reputation, but the single-player campaign is pretty interesting. A retelling of Heart of Darkness, it left many players nursing feelings.
- CPU: Intel Core 2 Duo CPU
- OS: Mac OS X 10.8 Supported, 10.9 or higher Recommended (Maverick)
- RAM: 4 GB RAM
- VIDEO: Ati 4670 or better, Nvidia 8800 or better, Intel HD 4000 or better
- 256 VRAM
- HDD: 8 GB