Project Mashup is an upcoming server, with the plan to put every minecraft minigame into one big pvp/pve match. To put this into context, imagine fighting an Enderdragon at speed 5 with a Quakecraft railgun, while riding a wither with a fellow teammate, who is firing eggs out of a shovel, in the middle of a giant war between a group of players all with crazy weapons from every minigame!
In one word, Chaos!