Defeat five enemies in a row with headshots

Find the Strange Relic

Finish the game in Easy Mode

Find 30 treasures

Defeat 50 enemies with the 92FS - 9mm

Defeat 100 enemies with headshots

Complete one Competitive Multiplayer game

Defeat 20 enemies with a single punch, after softening them up with gunfire

Find 20 treasures

Complete one Cooperative Multiplayer game

Find ten treasures

Defeat 50 enemies with hand-to-hand combat