Find mysterious scroll
Find 4 mysterious scrolls
Find all mysterious scrolls
Finish a minigame in less than 1 minute
Finish three minigames in a row without skipping
Finish all minigames without skipping
Find 3 Hidden Objects in less than 3 seconds
Complete one puzzle with less then 5 mistakes
Complete any Hidden Object Puzzle without using hints
Finish any Hidden Object Scene in less than 1 minute
Complete all Hidden Object Scenes without using hint
Use cradle
Travel to Cannon Rock
Save fishes
Ride down the mine
Finish the game in Expert mode
Watch the first 10 cutscenes
Read all the notes placed in the game
Unlock all the other Achievements
Pass the toilet paper to the scientist in need.
Perform surgical caffeine extraction from 20 machines.
Kill 10 Airborne Headcrabs using the Shotgun.
Kill 20 enemies with the Hivehand.
Ruin the microwave casserole.
Kill an Assassin with the .357 Magnum.
Kill 10 enemies with a reprogrammed Sentry.
Conduct all of the questionable research experiments.
Kill 10 enemies with Snarks.
Headshot 20 enemies with the .357 magnum.
Drown in Lambda Core's coolant.
Kill a Headcrab using fire.
Kill a Marine with their own grenade.
Kill 5 enemies with one grenade.
Kill an Icthyosaur with either the Tau or Gluon.
Use the alternate path in Office Complex.
Use an entire clip of Gluon ammo in one continuous shot.
Get overtaken by a Headcrab's ample anterior.
Interfere with the alarm and laptop in Anomalous Materials.
Overcharge it anyway.
Send the Hidden Hat to Xen.
Kill a Barnacle with a Satchel.
Refuse to insert the specimen into the Anti-Mass Spectrometer.
Help the Barnacle and Headcrab find true love.
Get killed by your own Snarks.
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