5. Fallout 4
Bethesda's latest should-be masterpiece is the strangest beast. On the one hand you've got this extremely elaborate crafting system where everything from tin cans to discarded weapons can be broken down and reassembled into components for either yourself or your base HQ, but on the other... nothing's really changed since Fallout 3. The 'If it ain't broken' argument comes out in abundance (and will most likely be in the comments section below), so for now let's focus on the world itself. Fallout 4's wasteland is the biggest and most expansive of the series we've seen so far, and Bethesda have seen fit to include a Skyrim-style mission design system that will generate quests to take you to every part of it. Once you've clocked the main quest you'll still only have seen half of it, and that's before you realise the game world extends past where your Pip-Boy map details. Fallout 4's greatest asset lies in your own explorative tendencies, and that alone spells out whether you think it's one of the best games of all time, or something that just missed the mark.