Get a double kill with any weapon.

Get a triple kill with any weapon.

Kill an enemy while using sense.

Unlock an alternate ending.

Unlock the basement.

Inspect every item.

Play Borderman.

Beat level 2 in Borderman.

Beat level 4 in Borderman.

Beat level 6 in Borderman.

Complete a contract.

Unlock a gun modification.

Unlock a sentinel echo.

Unlock all gun modifications.

Unlock all sentinel echoes.

Complete the game.

Perform a jump kill.

Perform a slide kill.

Perform a melee kill.

Kill 10 people in under 30 seconds.

Kill 10 enemies with a Formal 14.

Kill 10 enemies with a Davi-gale.

Kill 10 enemies with a Kompakt M8.

Kill 15 enemies with a sawed-off shotgun.

Kill 15 enemies with a Myalot X2.

Kill 15 enemies with a Savior.

Kill 30 enemies with a UZX.

Kill 30 enemies with a Subs-5.

Kill 30 enemies with a Kapus T4.

Kill 50 enemies with a Kata 7.

Kill 50 enemies with a KA-74.

Kill 50 enemies with a Behemoth.

Complete chapter 1.

Complete chapter 2.

Complete chapter 3.

Complete all achievements.

Hint: gramaphone.

Love interrupted...

Shame, shame...

Die 10 times.

Die 50 times.

Die 100 times.