Essentially, you and three other players are tasked with defending an objective from an enemy onslaught. (gamercrash.com)
You'll get missions like Red force defend an objective, while blue force attacks. (simhq.com)
Originally revealed in 2011, Fortnite started as a Tower Defense game with a focus on defending objectives while keeping in control of the action with a Third Person Shooter mechanics thrown into the mix. (gearnuke.com)