Overview
This guide will tell you what to do in order to make secret enemies spawn on all 10 mercenaries stages. Note that points awarded for killing may change according to your current combo count.
Urban Chaos
Secret enemy: Napad
Points awarded for killing: 1500
Spawn Requirements: Kill 15 enemies with counter attacks before your killcounter reaches 80.
Steel Beast
Secret enemy: Gnezdo
Points awarded for killing: 3000
Spawn Requirements: Execute 25 Coup de Grace attacks before killing 80 enemies
Mining the Depths
Secret enemy: Strelats
Points awarded for killing: 1500
Spawn Requirements: Kill 70 enemies in less then 300 seconds.
Rail Yard
Secret enemy: Ubistvo
Points awarded for killing: 5000
Spawn Requirments: Kill 25 enemies with quick-shots before your killcount reaches 80.
High Seas Fortress
Secret enemy: Gnezdo
Points awarded for killing: 3000
Spawn Requirements: Kill 40 enemies with any melee attacks before your killcount reaches 80
Catacombs
Secret enemy: Strelats
Points awarded for killing: 1500
Spawn Requirements: Kill 20 enemies using quick-shots before you reach 80 kills.
Requiem for War
Secret enemy: Gnezdo
Points awarded for killing: 3000
Spawn Requirements: Kill 70 enemies in first 300 seconds.
Liquid Fire
Secret enemy: Napad
Points awarded for killing: 1500
Spawn Requirements: Perform 25 Coup de Grace moves beofre your killcount reaches 80.
Rooftop Mission
Secret enemy: Napad
Points awarded for killing: 1500
Spawn Requirements: Kill 20 enemies with counter-attacks before your killcount reaches 80.
Creature Workshop
Secret enemy: Ubistvo
Points awarded for killing: 5000
Spawn Requirements: Kill 40 enemies with any melee attacks before your killcount reaches 80.