Xenoblade Chronicles had a massively expansive expanse that would leave players in a trance. The world was absolutely gargantuan, as if, not one, but two giant gods clashed together and created it. Wait... well, the game's sequel Xenoblade Chronicles X is even bigger. In fact, it's so big that Nintendo almost considered using more than one disk for the game.
Xenoblade Chronicles X clocks in at nearly twenty-five gigabytes of memory. That's over three-quarters of a Wii U's internal storage! This is one you won't want to download if you don't have an external hard drive. What's more, apparently the game is so big that developer Monolith Soft considered using two disks.
Check out the quote inside.