10. Undertale
What does it take to set the world on fire? Well, in a gaming sense, how about one of the most novel premises in history, a soundtrack that oozes more charm than a Pixar Christmas card-maker, and a cast of characters that all have more personality in their appearance than a hundred other games combined? Such a winning combo (all put together by coding powerhouse Toby Fox) catapulted Undertale to the top Metacritic almost overnight, where it reigned supreme above the likes of Half-Life 2 and Portal for a good few days, until settling on a highly respectable 94. Why? Because it's a trip back to whatever your first RPG was; a reminder that games can provide ludicrously fun, quirky and introspectively engaging worlds ripe for exploring. Undertale's story sees you dropped into an underground world of monsters, except they've formed a society and are getting by quite peacefully - a status quo you can maintain by befriending everyone, rather than slaying them where they stand. Sure, there's a 'real reason' you're there, but along the way you'll experience one of the most unique combat systems in years, have a few hundred laughs at the brilliantly-written dialogue, and realise the game's been playing you the entire time after the credits roll. It really is quite wonderful.