Kill 10 Enemies with Grenades While Hanging

Complete the game in hard mode

Complete the game in 6 hours or less

Defeat 100 enemies in a row without dying in combat

Beat the best score in the retro videogame

Defeat enemies with a stealth attack, melee attack, headshot, and explosives, in that order, in 15 seconds

Defeat 10 enemies in 60 seconds with the China Lake Grenade Launcher

Defeat 10 enemies in a row, alternating gunplay and hand-to-hand

Perform 30 vertical stealth takedowns

Complete 3 Bomb Defusal quests (Campaign only).

Perform a takedown from a Buzzer (Campaign only).

Reach Arena Rank 5 (Campaign Arena only).