Defeat 30 enemies with the Dragon Sniper

20 times in a row, pick up ammo while rolling

Defeat 50 enemies in a row without auto-reloading

Defeat five Riot Shield enemies by running over their shield

Find the Strange Relic

Defeat 30 enemies with the PAK-80

Complete the Monster's Tutorial.

Platinum

Defeat ten enemies in a row with a single punch, after softening them up with gunfire

Find 90 treasures

Defeat 200 enemies with the GAU - 19

Find 70 treasures

Defeat 30 enemies with the RPG - 7