We reckon Sword Art Online: Hollow Realization is the best Sword Art Online title on the market, so it's pleasing to hear that the game's long awaited free expansion is launching next week on PlayStation 4 and Vita. Dubbed 'Warriors of the Sky', the expansion will be available as an update, and will feature "extra characters, bonus stages, Game System adjustments and extensions". Basically, it's a big one, and again, it won't cost you a penny. You can get all the details from the trailer that we've embedded above.

You'll be able to download Warriors of the Sky on the 14th March, but will you be jumping back into Hollow Realization to try it out? Wish that more expansions were totally free in the comments section below.

[source swordartonline-game.com]