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