Pandemic: On the Brink is an exciting expansion designed to increase the difficulty of the Pandemic base game. It features new event cards and new role cards. Has saving humanity become routine? Spice up Pandemic with new roles and events. Add a fifth player, try Legendary difficulty, or add an optional challenge: What if one disease is particularly nasty? Or, if a fifth disease is wreaking havoc? Or, even worse, if that fifth disease is being spread by a hidden Bio-Terrorist? BIO-TERRORIST Use only in the Bio-Terrorist Challenge. After each player turn, do up to 2 actions, plus 1 Drive/Ferry action (in any order). Contains: 7 new Role cards, with matching pawns, 8 new Event Cards, 8 Virulent Strain Epidemic cards, 12 purple Disease cubes, 1 purple Disease wood marker, 1 Cure Indicator sticker and card, 2 Mutation cards, 3 Mutation Event cards, 1 Bio-Terrorist location pad, 1 Epidemic card, 1 reference card, 4 blank cards for customizing, 5 petri dishes and labels. Age 13+ Players 2-5 Playing Time 45 Minutes.