There is no guide for this game yet. But apparently it is EASY POINTS!

 

 

The Easy Way - 100 points
Complete game in easy difficulty

The Normal Way - 150 points
Complete game in medium difficulty

The Infernal Way - 200 points
Complete game in hard difficulty

Infernal Power - 10 points
Obtain Infernal power

Teleportation - 10 points
Obtain Teleportation power

Multiple Teleportation - 10 points
Obtain multiple Teleportation power

Mana Booster - 30 points
Find 3 mana boosters to increase your mana

Health Booster - 30 points
Find 3 health boosters to increase your health

Betrayal - 20 points
Complete Prologue

The Dark Angel - 20 points
Join the Abyss

The Cloister - 20 points
Get inside the cloister

Cable Ride - 20 points
Get to the upper cloister

The Acolytes - 20 points
Survive the upper cloister

Walls of Pain - 20 points
Complete mission 1

The Chase - 20 points
Find Elena

Duel - 20 points
Defeat Elena

Going Down - 20 points
Find Wolf's lab

Heaven's Triumph - 20 points
Complete mission 2

Steelworks - 20 points
Enter the Steelworks

Running Man - 20 points
Complete mission 3

Wings of Steel - 20 points
Find the plane

 

Reflection - 20 points
Find the device in the plane

The Resurrection - 20 points
Find Barbara

Airstrike - 20 points
Complete mission 4

The Island - 20 points
Find the Observatory

The Saint - 20 points
Complete Mission 5

The Cowboy Way - 20 points
Find Dual Pistol

Fire Away - 20 points
Fire rocket launcher 20 times

The Dark Force - 20 points
Use infernal powers 100 times

Precision - 20 points
Don't activate the gas traps in the plane

The Collector - 20 points
Retrieve energy from 100 enemies