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42 of 42 (100%) achievements earned:
Personal Achievements
 

Hit and Run

Break out of the Combine prisoner transport vehicle.
Unlocked 5 Apr, 2021 @ 4:00am

Quaranta Giorni

Enter the Quarantine Zone.
Unlocked 5 Apr, 2021 @ 4:28am

Mazel Tov

Pick up and smash 50 glass bottles.
Unlocked 24 Sep, 2021 @ 6:50am

Good Grub

Feed the snark.
Unlocked 5 Apr, 2021 @ 3:46am

On a Roll

Interact with the playground somehow.
Unlocked 13 Nov, 2021 @ 10:47am

Little Slugger

Represent yourself with a specific prop on Russell's map.
Unlocked 13 Nov, 2021 @ 10:49am

Eye of the Geiger

Measure Russell with the Geiger counter.
Unlocked 13 Nov, 2021 @ 10:48am

Mag-Snagger

Catch Russell's ammo magazine before it hits the ground.
Unlocked 5 Apr, 2021 @ 4:08am

Sustenance

Receive a tasty treat.
Unlocked 5 Apr, 2021 @ 4:58am

Freshly Squeezed

Test your grip on a headcrab heart.
Unlocked 13 Nov, 2021 @ 11:11am

Zombie with a Shotgun

Collect the shotgun.
Unlocked 5 Apr, 2021 @ 5:23am

Xen Garden

Enter the explosive Xen infestation.
Unlocked 12 Apr, 2021 @ 6:36am

Off the Rails

Stop the prisoner transport train.
Unlocked 14 Apr, 2021 @ 10:22am

Checking In

Reach the Northern Star.
Unlocked 2 May, 2021 @ 5:25am

Heart-Breaker Hotel

Get creative turning the power back on.
Unlocked 29 May, 2021 @ 5:51am

Surface Tension

Escape the underground pit.
Unlocked 16 Jun, 2021 @ 10:07am

Unbonded

Collect the SMG.
Unlocked 27 Jun, 2021 @ 4:51am

Cord-Cutter

Shut down the substation.
Unlocked 22 Sep, 2021 @ 5:30am

Blast From the Past

Defuse a roomful of explosive barrels.
Unlocked 24 Sep, 2021 @ 7:39am

Sound Strategy

Escape the distillery without killing Jeff.
Unlocked 6 Nov, 2021 @ 6:47am

Flat Note

Kill Jeff.
Unlocked 14 Nov, 2021 @ 3:11pm

Crustacean Frustration

Kill the annoying headcrab before it breaks everything.
Unlocked 14 Nov, 2021 @ 3:03pm

Hold Your Liquor

Catch a bottle falling out of a cupboard before it breaks and alerts Jeff.
Unlocked 6 Nov, 2021 @ 6:37am

Sea Level

Reach the aquatic exhibits.
Unlocked 6 Nov, 2021 @ 7:10am

Triple Bypass

Solve the tanker yard's electrical puzzle and escape.
Unlocked 7 Nov, 2021 @ 8:12am

High Water March

Start climbing the water tower.
Unlocked 8 Nov, 2021 @ 10:36am

Textbook Jinxing

Wake the Strider.
Unlocked 8 Nov, 2021 @ 11:03am

Point Extraction

Get to the superweapon.
Unlocked 13 Nov, 2021 @ 4:18am

Consequences

Make your choice.
Unlocked 13 Nov, 2021 @ 4:22am

Dead Giveaway

Loot a corpse.
Unlocked 5 Apr, 2021 @ 4:12am

Smash and Grab

Break open a supply crate with your hands.
Unlocked 5 Apr, 2021 @ 4:43am

Up in Arms

Install your first pistol upgrade.
Unlocked 5 Apr, 2021 @ 4:37am

Pro-Pain

Kill a grunt by shooting their gas tank.
Unlocked 14 Apr, 2021 @ 10:05am

Indirect Approach

Kill a Combine Heavy while their shield is up.
Unlocked 13 Nov, 2021 @ 12:57pm

Combine Harvester

Use the gravity gloves to loot an item off a living Combine soldier.
Unlocked 24 Sep, 2021 @ 7:12am

Xen Lootism

Snatch a Xen grenade from its resting place.
Unlocked 29 May, 2021 @ 5:41am

Safe Trip

Use the multitool to hack a tripmine.
Unlocked 22 Sep, 2021 @ 5:47am

Deadliest Catch

Use the gravity gloves to intercept an incoming enemy grenade in mid-flight.
Unlocked 24 Sep, 2021 @ 7:17am

Near-Jeff Experience

Stay close to Jeff for 10 seconds (but not too close).
Unlocked 14 Nov, 2021 @ 3:06pm

Team Spirit

Bring Russell a bottle of vodka.
Unlocked 14 Nov, 2021 @ 3:13pm

Gnome Vault of My Own

Bring a garden gnome with you to the Vault.
Unlocked 16 Nov, 2021 @ 4:23pm

Gnome Alone

If you are reading this achievement, Gabe Newell has successfully launched Gnome Chompski into space. If you did not also receive the achievement 'Manufacturing Ascent', Newell has abandoned his plans to shoot Noam Chomsky into space.
Unlocked 5 Apr, 2021 @ 3:38am