Special Forces: I Sign In at Devil's Island Prison from the Start

Transmigrated into the world of special forces, he starts out trapped in the Devil's Island prison! Fortunately, Su Han awakens the Adventurer Sign-In System. The more dangerous the mission environment, the greater the sign-in rewards! His first sign-in rewards: 1. Grandmaster-level lockpicking, 2. Large rapid-acting anesthetic spray, in a barrel. His first completed mission reward: Gene Enhancement Serum: Hardened Skin, with a strength equivalent to a 6 mm ultra-high-strength steel plate. From then on, Su Han's catchphrase becomes: “Please give me the most, most, most... most dangerous missions you have, because I need them!”