This is a purely incredible game. A first person shooter that uses Time Travel as its main gimmick, Darkest of Days is a solid game with a lot of potential that never quite gets around to really exploring it. The games gunplay handles pretty well. You use a lot of period weaponry to maintain your disguise as a denizen of that time; in the Civil War, youre using muskets and revolvers, while in World War 1 you have more powerful bolt-action rifles. However, you also have the option of using future weapons, when you can get them; the rarity of these weapons shows their power, as an assault rifle or shotgun can make a battle much easier than it would normally be. Oddly, though, nobody ever notices you using these weapons, which makes one wonder why the Time Police bother to send you in the past with historically accurate weapons. The graphics are okay, but not great. They look a few years outdated, but not in such an obnoxious way as to detract from the game as a whole. The sound is pretty good in some respects (gunshot noises, environmental noises) and not so great in others (voice acting). The game runs silky smooth at full detail on my iMac 3.06 GHz Intel Core 2 Duo * 4 GB RAM * ATI Radeon HD 4670 256 MB * Mac OS X Lion 10.7.