From here, you can purchase REACT Credits as DLC bundles of varying sizes, priced accordingly: To purchase REACT Credits, you can go to either the second tab in the in-game store, or the add-on content section on the Rainbow Six Extraction page on the digital storefront where you purchased the base game. This is quite deliberately the most intensive gameplay challenge in Rainbow Six Extraction, but the rewards for success are huge XP and REACT Credit payouts, as well as an exclusive item of headgear once per season. You and your team can choose to extract after successfully completing an objective with the experience and loot you've earned so far, or push on to finish more objectives - at the risk of losing everything you've earned in the current run if your characters die. You'll also be limited in your choice of Operators, with only six characters eligible to take part per week and losing an Operator in Maelstrom will require you to return to the core game in order to rescue them. Each objective features a different mutation, and for every three objectives you complete, health and ammo pick-ups will become rarer and the objective timer will get shorter. In a Maelstrom Protocol challenge, you'll need to finish nine objectives per mission rather than the regular three. Maelstrom Protocol is Rainbow Six Extraction's endgame mode, featuring a weekly challenge recommended only for players who have fully levelled up their Milestones and Operators, and you're advised to bring along only your best weapons. How to earn REACT Credits in Maelstrom Protocol They can either be bought with real money or earned by participating in Maelstrom Protocol. How do you get REACT Credits in Rainbow Six Extraction? REACT Credits are the premium currency used in Rainbow Six Extraction, which can be exchanged in the in-game store to redeem cosmetic items and consumables.