Doom 3 is a weird game. It tries to be a horror title, but it is Doom at its core. So you are an unstoppable killing machine with a shitty flashlight that doesn't work half of the time, and this game can get really, really dark (talking exclusively about lighting here). Gunplay is not the greatest in the series and I personally don't enjoy this game's shotgun all that much. Other than that, it is a perfectly serviceable shooter.