To get 100% legitimately takes roughly 25–30 hours. The collectible grind—specifically finding the 45 Blackboxes without the DLC radar—is tedious. This save cuts that time to zero.
The Mercer skin is a high-fidelity recreation of his Prototype 2 model, which serves as the game's final boss.
Most 100% saves are compatible with "New Game Plus," letting you replay the story as Alex Mercer from the very first mission. How to Install a Prototype 2 Save Game (PC)
A means:
For fans of the 2009 original, Heller feels clunky. Mercer’s slender frame and sleek black/red biotic armor are visually superior to Heller’s bulkier, army-style infection. The skin mod captures the specific texture mapping of Mercer’s Prototype 2 model (which is slightly updated from the first game).