Here is the full list of all 45 Daymare: 1998 achievements.
Find the flux capacitator
Get all ID Tags
Find all Hexacore secret rooms
Find the barrelled corpse
Find the chemical formula mural
Utilize 100 fast reloads
Get all audiologs
Utilize 100 slow reloads
Find the movie poster
Find playing cards
Find the arrow in the tree
Shoot the red balloon
Shoot the shaving cream can
Perform 10 exchanges at an H.I.V.E. terminal
Complete chapter five
Finish the game on Daymare Mode
Find the researcher's corpse
Complete chapter four
Reach 50% of overdose
Find the science magazine
Find the programmer's corpse
Find the dead viewer
Shoot at 5 false enemies
Find the exploded corpse
Complete chapter three
Wait for the suggestion
Get the desert eagle
Hack into a "very hard" terminal
Find the sewer pinball
Cast off 50 enemy limbs
Perform a melee attack on the Melted Man
Knockback 20 enemies using melee attacks
Complete chapter two
Take out 50 enemies with headshots
Get the magnum
Free yourself from 20 grabs
Complete chapter one
Get all documents
Spot all puppet deer
Finish the game in 4 hours or less
Finish the game without dying
Craft every type of rapid use fluid
Find the branded oak barrel
Find the tris game
Find the H.A.F. plate