Spillover is described by the developers as the ultimate defense experience in Rainbow Six Extraction, putting an emphasis on properly preparing defenses (reinforcing walls, doors and windows, placing traps, etc.) just like in a Rainbow Six Siege match. These incursions, limited to a single submap, will feature nine so-called Sprawl Colonies to decontaminate with the new Dissolution Agent canisters in any order you want. When a canister is activated, players will need to defend it for 90 seconds from waves of Archæans assaults. Do note that the enemy types will change from time to time, and the Archæans will head straight for the canister (which has 500 health points) unless impeded to do so. Additionally, Sprawl Colonies can have one out of three traits in Spillover: Cloaked(all Archæans spawned by them will be invisible), Spore (all Archæans carry spores on them), and Elite (some Archæans will be Elite foes). The Archæans spawned by Sprawl Colonies are also always alert and aware of the player’s position, so stealth won’t work. The more Sprawl Colonies you’ve managed to complete, the stronger the Archæans will be. You can attempt to decontaminate two or even three Sprawl Colonies at the time, but because of the aforementioned growing difficulty, this is best done at the beginning of the incursion. Players will have twenty-five minutes to do everything and extract. Of course, you don’t need to complete everything before extraction, though that would only earn you a partial reward. The full reward XP is higher than the amount you normally get in the regular game, by the way. As if that wasn’t enough of an incentive, defeating 500 Archæans during the Spillover event (set to last three weeks) will unlock the exclusive REACT portable Auto-Turret. The turret won’t be obtainable anymore after the event is over. Of course, there are also exclusive weapon charms, skins, and outfits to be earned. Last but not least, Spillover permanently adds the beloved Rainbow Six Siege operator Zofia, who packs a handy Grenade Launcher. She is focused on survivability, making her a great asset in this specific Crisis Event.
