Reapers represent a middle-ground between the human-sized Spectres and Stalkers, and the massive Titans, but are fully automated. Agile, relentless, and deadly, Reapers are anti-Titan units armed with rapid-fire launchers implanted in their forearms that fire Reaper Rockets, projectiles of a similar vein to the EPG-1, EM-4 Cold War or Titan Sentry judging by the visuals and effects of the projectile. They can quickly wear down a Titan's armor at close range, but scatter over long distances. Reapers usually remain in one area and move slowly; barraging the enemy with a hail of plasma, but they are also capable of charging sprints and leaping up to great heights to attack enemies in melee range with powerful ground strikes, particularly when organic prey is nearby.
Reapers are very durable, and although dispatching them is relatively simple when using Titan armaments, Pilots will almost certainly struggle to break through their heavy armor and risk drawing their attention. Reapers store racks of ticks in the back of their distinctive hunchbacked chassis and are able to quickly deploy these in large numbers by ejecting them into the air. Reapers utilize this armament if their targets move to cover out of their line of sight; posing further threat to pilots if not in a Titan. Reapers are vulnerable in their waist servos and "hunchback" and always explode violently when destroyed - making even their demise potentially lethal for pilots and other units standing nearby.
Reapers are also encountered in Attrition and Bounty Hunt, appearing in the later part of matches. They are worth 5 points - the same as a Pilot - in Attrition.
In Frontier Defense, Reapers are capable of inflicting significant damage to the Harvester in a very short span of time. Care should be taken to ensure no Reapers slip through to the Harvester; just one can do a lot of damage quickly, and three or more can easily destroy even a fully-shielded, intact Harvester before help can arrive.