Kill your first enemy.

Kill 10 enemies with headshots.

Land 5 headshots in a row.

Kill 25 enemies with melee attacks.

Land 10 melee hits in a single match.

Hit 3 enemies with a single shotgun blast.

Kill an enemy with the last bullet in your magazine.

Perform your first reload.

Kill 50 enemies without dying.

Complete a section without taking damage.

Get 50 headshot kills with the Rifle.

Kill 75 enemies with the Shotgun at close range.

Kill 150 enemies with the Assault Rifle.

Use the Radar slot for the first time

Find 10 books using the Radar.

Collect all books in Book Collection mode.

Complete Book Collection mode without using melee.

Finish a section without switching weapons.

Get your first kill while crouching.

Eliminate 75 PvE enemies in a single match.

Kill 8 enemies within 20 seconds.

Reload 10 times in total.

Kill 20 enemies while crouching.

Complete all achievements.