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