Atlantic is a map to be played with Trampoline, an infection minigame. It is a small, square area with platforms large and small surrounded by bubble columns disguising gravity lifts, flanked by classical-inspired structures where the infected players plot the survivors' demise.
The objective of the infected players is to use splash damage to knock the bouncing survivors into hazards or onto the ground, which is a kill area. The objective of the survivors is to survive until the end of the round.
The difficulty for survivors increases as the timer runs out. First, platforms and grav lifts explode at timed intervals, narrowing movement and escape options. Second, infected players gain access to weapons with more knockback later in the round. This keeps rounds tense to the last second while keeping them short enough so that no player is left out for too long.