Halo 5: Guardians just received one of its biggest and most anticipated patches today, with the Memories of Reach update hitting the Xbox One exclusive. The update adds a ton of new things to Halo 5, while also changing and fixing other aspects of the game. You can check out the full patch notes right here, or keep reading to see some of the highlights from the update.

Infection is probably the biggest thing that Halo fans wanted out of this update. The fan-favorite gamemode is back, pitting two teams of players against each other, with one being “infected”. Each time the infected kill someone they become infected as well. The winner is the last man standing. “Surviving just got a whole lot harder. If you die by an Infected hand, you join their ranks. One of Halo’s most beloved and frantic modes is back in a whole new way. Band together with your fellow survivors or hunt your prey with cunning and skill; the highly anticipated Infection game mode is making its way to Halo 5!”

As the title suggests, Halo 5 Memories of Reach brings in content from the Halo Reach prequel. This means new armor sets based around that game’s unique style, as well as entire characters from the campaign. Jun, Jorge, Emile, and Kat are all back, and you can sport their armor.

This Halo 5 update also brings with it a new arena map called Stasis. “Stasis is a mid-sized map that combines elements of symmetric sides with moderate asymmetrical features, giving it a hybrid design that’s unique to Halo 5’s Arena multiplayer. Featuring a distinct three lane layout with varying degrees of verticality between them, Stasis plays particularly well with both Slayer and Capture the Flag.”

That’s not all though, so click here to read about everything in this massive update.