. "The Library"@en . . . "Two Betrayals"@en . "This is the only all-Flood level in Halo: Combat Evolved, and one of the most difficult in the entire game."@en . "The Library (level)/Walkthrough"@en . "343"^^ . "This is the only all-Flood level in Halo: Combat Evolved, and one of the most difficult in the entire game."@en .