Perimeter Defense

Perimeter Defense marries LitRPG with hard sci-fi space opera, following protagonist Ruslan commanding a space fleet in a game-world that may not be virtual. As humanity faces alien invasion and territorial loss, the narrative emphasizes military strategy, command decisions, and the question of reality versus simulation. This four-book series appeals to readers seeking serious sci-fi LitRPG with complex worldbuilding, strategic gameplay, and exploration of what defines reality in game-like systems.