Clear all balls off the pool table

See Johann's name in the ending credits

Look in all peepholes and telescopes long enough to hear Edith's commentary

Catch 2 rabbits with only 2 swoops

Unlock all the trophies.

Kill an enemy with every weapon

Shoot an airborne grenade during Blacksight

Incinerate 15 enemies

Kill 5 enemies with a headshot during Blacksight

Find all inspect items

Stun an enemy 30 times with the M2 ‘Falchion'

Inspect all newspapers

Kill 10 Lycans