The promotion runs from 6 p.m. ET today through this Monday, Dec. 21, at midnight. Each player will receive four referral keys to pass along to others, and will earn a 24-hour renown bonus upon redemption.
For those who are turned onto Rainbow Six Siege during the trial weekend, a 25 percent discount off the game is available, as is the ability to keep all progress made during the referral period.
We reviewed the latest Tom Clancy game after it launched several weeks ago — a release that came as the result of a two-month delay. A beta for the multiplayer-focused shooter arrived shortly before the full game, and suffered its own delay just before launch.