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