That said, it's huge, and I recall staring at screens of options, 20 hours in (at around 25% or less completion), with 19 pending R&D projects, 30+ un-listened audio tapes, scores of 'completed' missions with at least four hidden sub-objectives blanked out, and ten un-tackled side-ops. It's a real challenge for the more traditionally-orderly MGS gamer, who might regard any mission as a failure, unless they've nailed an S rank with zero kills and zero alerts. Fuelled by time pressure, I completed several missions covered in blood, sprinting with a hostage on my shoulders, alerts blaring and with mortars raining down all around. The scope for replay is staggering. If you consider MGS: Ground Zeroes derided for its length despite its staggering tactical depth then MGS5 feels around 50 times bigger (while the actual Phantom Pain map is 200 times bigger than Ground Zeroes), with a dazzling variety of missions.