HellCopter is an action-packed helicopter rescue game where players are tasked with infiltrating a building occupied by a terror group. The mission begins with a helicopter landing on the rooftop, and players must clear each floor of enemies before progressing. Armed with ammo and ready for combat, players need to fend off attacks from hostile forces as they ascend the building, facing increasing challenges and enemies. The game offers a thrilling, fast-paced rescue operation with a focus on strategic shooting and survival.