Kirito awakens in a completely unknown virtual world, but something about it feels a bit familiar...
Set in Underworld, an expansive world introduced in the SWORD ART ONLINE anime, Kirito sets out on adventure in the series' latest RPG!
Enjoy seamless, action-packed real-time battles using a combination of sword skills, sacred arts, and your favorite SAO characters!
Kirito meets a boy named Eugeo. Somewhere deep within their hearts is a lingering promise. To fulfill that promise and avoid losing each other, they set out on adventure together. Nothing will keep them from reaching their goal.
Login or register at the official Steam Website and download Steam client
Install and start application, login with your Account name and Password
Click the Games Menu.
Choose Activate a Product on Steam...
Follow the onscreen instructions to complete the process
After the successful code verification, go to the "MY GAMES" tab and start downloading.
News & Updates
2026-04-21
From Wishlist to Courtroom: The Steam Lawsuits Explained
There have been numerous Steam court case lawsuits throughout the years and ever since the start of the year they have made the pile even bigger! We decided to check out some of the latest accusations against the popular gaming platform as well as go through some of the previous cases that caused a stir of Valve legal issues in the past! Gabe Newell and Valve have definitely not been strangers to the court system…
As you probably know, in a huge variety of game titles there are usually a lot of mainline task objectives, but very often there are multiple side quests that would advance you further in the gameplay. This is exactly why we decided to run a Side Quest promotion on our YUPLAY site. In order to participate in it you have to make an order over 20€ between 17.04.2026 18:10 CET and 20.04.2026 02:00 CET, and you will get a 1€ voucher for next purchase…