If you have never played Rainbow Six Siege before, you can jump in this weekend if you want to because it is free to play on PC and Xbox One.
As announced on the Rainbow Six Siege website, the game is playable for free from July 28th until August 1st.
The game is available to download via Xbox Live for Xbox One gamers. If you have a PC, you need to install Uplay first and get it there. The full game is playable for as long as you want until the weekend ends.