The Elder Scrolls V: Skyrim
Since way back in the days of Arena and Daggerfall, The Elder Scrolls games have been about exploring enormous worlds. Skyrim upped the ante over both Morrowind and Oblivion, with a gorgeous mountainous land that never feels repetitive or empty. The ability to fight huge dragons, and call upon their strength as the Dragonborn, adds another level of awe to the experience of playing Skyrim. Should you play the game on PC, there are countless mods available – including one that replaces the dragons with Thomas the Tank Engine.