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

Lock 'n' Load - 25 points

Found Rifle

Sightseeing - 10 points

Found 1 Photo

Josh's Gallery - 50 points

Found ALL Photos

Alchemilla's Finest - 10 points

Defeated 1 Nurse

Eddie's Legacy - 10 points

Defeated 1 Feral

Lurk No More - 10 points

Defeated 1 Lurker

To The Point - 10 points

Defeated 1 Needler

Split Personality - 10 points

Defeated 1 Schism

Shades of James - 20 points

Defeated 1 Siam

Clear the Air - 10 points

Defeated 1 Smog

Creeper Reaper - 10 points

Defeated 1 Swarm

Out of Order - 10 points

Defeated 1 Order member

Kaufmann's Handiwork - 10 points

Found 1 Serum

Health Junkie - 50 points

Found all Serums

The Old Gods... - 100 points

.. Haven't Left This Place Complete game on HARD difficulty.

Nursery Rhymes - 50 points

Found all the Children's Drawings

Secret Achievements

Six Feet Under - 50 points

Defeated Sepulcher

Blood Donor - 50 points

Defeated Scarlet

Catch Your Breath - 50 points

Defeated Asphyxia

Head Above Water - 50 points

Defeated Amnion

Rising Tension - 25 points

Found Circular Saw

Science Fiction - 25 points

Found Laser Pistol

Smile - 50 points

Achieved Ending 1

In Water - 50 points

Achieved Ending 2

Judgement - 50 points

Achieved Ending 3

Intensive Care - 50 points

Achieved Ending 4

No Dogs Allowed - 50 points

Achieved Ending 5

Mercy - 20 points

Alex ended his mother's suffering

Compassion - 20 points

Alex could not end his mother's suffering

Forgiveness - 20 points

Alex Forgives his father

Angela's Choice - 20 points

Alex does not forgive his father

Now About Those Drinks - 25 points

Saved Wheeler