Be the first to reach the target zone by hitting speed pads to build up energy. Once you're built potential zones you can either use the energy to boost your current zone, dropping a highly damaging barrier in the process, or absorb it to replenish your shield integrity and gain a temporary shield.
Upsurge was introduced in version 1.1, alongside the Neon Nights Expansion. Based on the Survival game mode, Upsurge tasks pilots to try and hit the target Zone (Between 15 and 100) by hitting speed pads in order to build up energy. When a pilot gains enough energy, they can expend all of it to either boost their ship's speed to a higher Zone, dropping an Upsurge Barrier in the process, or to absorb it into their Shield. If a pilot runs out of Shield, they respawn and lose 5 zones.