Solve the Blast Pit fan puzzle
Hit a headcrab with a melee attack in mid-air
Fry the Gargantua
Speak to all scientists in the pre-disaster maps
Blow up all the bridges in Blast Pit
Throw a gib at a scientist or barney
Drive a train
Your moral support saved them!
Fail to save the "we're doomed" scientist
Get killed by the fan in the vents
Kill a soldier with an experiment
Get teleported to all of Nihilanth's spaces
Pick up an alien gib
Explode the Gargantua with airstrikes
Face the G-Man
Get the HEV suit
Play with the laptop in the entrance area
Launch the satellite rocket
Turn off the lights in the office in the starting area
Join the G-Man
Do the microwave thing
Repeat the conveyor loop
Save the "we're doomed" scientist
Get killed by the eletric ceiling light
Don't kill anything in the entire game (except Nihilanth and the Blast Pit tentacles ofc)
Save the barney from running into the barnacle
Complete We've Got Hostiles without activating any laser traps or trip mines
Fly directly into the pipe from the train
Touch a houndeye without hurting it
Kill a scientist with the instruments
Drink a soda can
Get the crowbar
Kill all the aliens with all the experiments
Kill a barney or scientist with an experiment
Complete the Hazard Course
Beat the Nihilanth
Find the small cup
Never get noticed by the tentacles
Surface behind the tank
Get sniped
Start the game
Don't kill any scientist or barney the entire game
Use the broken elevator
Press the alarm button in the entrance area
Make the hanging scientist in the entrance area fall to their death
Don't join the G-Man
Reach the cliffs
Reach Xen
Grab the battery in your locker
Meet the Nihilanth
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