Here is the full list of all 27 The Outlast Trials achievements.
Acquire the "Marathoner" badge.
Acquire the "Mechanophiliac" badge.
Acquire the "Big Saver" badge.
Acquire the "Hunchback" badge.
Acquire the "Sleight of Hand" badge.
Acquire the "Together We Are Strong" badge.
Acquire the "Crowd Control" badge.
Acquire the "Hypochondriac" badge.
Acquire the "Sawbones" badge.
Acquire the "Spreed Freak" badge.
Acquire the "Breathe In" badge.
Acquire the "Power Surge" badge.
Acquire the "Bullseye" badge.
Acquire the "Major League Player" badge.
Acquire the "Bamboozler" badge.
Acquire the "Chicken in a Pot" badge.
Acquire the "Trigger Happy" badge.
Acquire the "Anger Issues" badge.
Acquire the "Glutton for Therapy" badge.
Acquire the "Toastmaster" badge.
Acquire the "Tapetum Lucidum" badge.
Acquire the "Vision Quest" badge.
Acquire the "Get Down" badge.
Acquire the "Hemophiliac" badge.
Acquire the "Hoarder" badge.
Acquire the "Slip and Slider" badge.
Acquire the "Can't Touch This" badge.