You can "master and discuss the strategies and tactics of siege" ahead of the games release on Xbox One and PS4 in December.
And if you complete the missions set by the games maker you'll be rewarded with a 'beta' key to try out the game before release.
Tom Clancy’s Rainbow Six Siege focuses on multiplayer battles as police try to take back control from crooks who have laid siege to buildings.
A spokesman for Ubisoft said: "Being one of the most complex forms of warfare, the siege technique requires years of training for elite teams, in order to handle each situation with the right strategies and tactics.
"With Art of Siege, players will enter Field Training, an intense Rainbow Six training program allowing them to get familiar with the different gambits, strategies and Operator specialties.
"Only the players able to earn the total gold stars in the five Field Training Exercises will obtain a key to the Closed Beta.
"Art of Siege will also include Wall of Tactics, an area in which each Closed Beta participant will be able to share their best tactical videos, recorded during their own matches.
"It will be up to other players to vote and elect which tactics are the best overall."
Wall of Tactics will go live with at the launch of the Tom Clancy’s Rainbow Six Closed Beta, on September 24 on PlayStation4, Xbox One and Windows PC.