Complex sentence: A'Capture the Flag'-style mode in which players are divided into two teams, one of which must protect a Little Sister while the other tries to steal her and place her in a vent on the other side of the map.
Split into simpler sentences: A'Capture the Flag' style mode where players are divided into two teams. One team has to protect a Little Sister while the other team tries to steal her and place her in a vent on the other side of the map.