In Survival, gasmask filters – which put a timer on your lifespan when you're exploring Moscow's toxic surface streets – were often in short supply, but I never had to use military-grade bullets (which double as currency and powerful last-resort ammunition) until the very end, I never ran out of medpacks, and devastating weapons – like silenced shotguns and Kalashnikovs – were usually within easy reach. This makes no difference gameplay-wise, but it's a nice touch.) Being able to pick your pace and style of gameplay is a cool feature, although it's worth noting that playing through Metro 2033 on Survival mode in Normal difficulty definitely feels more forgiving than the original, so players looking for a serious challenge should immediately kick it up to Hardcore. (If you forget which one you chose, just look at your watch – 2033's analog model shows up in Survival, while Spartan features Last Light's digital timepiece. It begins with the choice of whether to scuttle through the tunnels in Survival mode – which promises harsher, Metro 2033-esque threats and scarce resources – or storm them with plentiful ammo and faster pacing in the Last Light-inspired Spartan mode. (Also, get ready to hear lots from veteran anime-and-game actor Steve Blum, who lends his gravelly voice to roughly half of the characters.) That’s all unchanged from the original version on Xbox 360, PlayStation 3, and PC, but Redux improves on both the graphics and gameplay in significant ways - mostly for the better. Here, bullets are currency, guns are ugly and homemade, gasmasks spell the difference between life and death, and everyone calls them "gosmosks" in hokey faux-Russian accents. It’s a journey that takes you through creepy tunnels and ruins haunted by shaggy monsters and eerie phantoms, in which tense moments of stealth or exploration might suddenly give way to explosive, crowded firefights.