Pandemic is the cooperative board game most others are measured against. Matt Leacock designed it in 2008, and the current Z-Man edition adds two roles for seven in total. Players are a team of specialists, such as the Medic, Scientist and Dispatcher, moving around a world map of 48 cities. Four diseases spread from city to city, and the team wins by discovering all four cures before outbreaks, cubes or the player deck run out.
The tension comes from the epidemic cards. You shuffle 4, 5 or 6 into the player deck to set the difficulty, and each one intensifies infection and reshuffles cities that already have cubes back on top of the infection deck. The cities you just treated get hit again, so the game keeps pressure exactly where you are weakest. Wins usually come down to the last few cards.
The common complaint is quarterbacking. All hands are open, so one experienced player can direct every move, and quiet players can end up watching. Rules variations help, but the box itself does not solve it. Pandemic also caps at four, and once a group wins comfortably at six epidemics, the base game has little left to teach.