Afterburner

The Afterburner is a chip slot weapon mod in Marathon that rewards mobile, aggressive combat by triggering a partial magazine reload whenever the runner performs a slide. In addition to restoring rounds to the magazine mid-fight, the Afterburner also boosts weapon stability after the slide, tightening recoil and improving accuracy immediately after the movement. This creates a powerful synergy between movement and firepower: runners who slide frequently will spend less time reloading and more time on target.

The Afterburner chip is particularly effective on weapons with smaller magazine capacities, where the slide reload can meaningfully extend a damage window that would otherwise require a full reload animation. Runners who play a fast, flanking style will find that combining slides into a combat routine keeps pressure on enemies without losing momentum. The chip slot is universal across all weapons in Marathon, making the Afterburner one of the most versatile and mobility-focused mod choices available regardless of weapon type.