Half-Life 2

Xbox, PlayStation 3, Linux, Android, PC (Microsoft Windows), Mac, Xbox 360

Shooter - 2004

1998. HALF-LIFE sends a shock through the game industry with its combination of pounding action and continuous, immersive storytelling. NOW. By taking the suspense, challenge and visceral charge of the original, and adding startling new realism and responsiveness, Half-Life 2 opens the door to a world where the player's presence affects everything around them, from the physical environment to the behaviors even the emotions of both friends and enemies.

Checklist for 100%ing Half-Life 2, made for completionists. Track your progress toward a full clear, spoiler-free by default, great for first playthroughs.

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Achievements

Chapter 1: Point Insertion

SubmissivePut the can in the trashcan instead of throwing it at the metrocop watching the train platform.

DefiantThrow the can at the metrocop instead of putting it in the trashcan. You can only get this or Submissive on a given playthrough; reload or changelevel to get the other.

MalcontentEscape the apartment block raid with Barney's help.

Chapter 2: "A Red Letter Day"

Trusty HardwarePick up the crowbar in the resistance hideout.

What cat?Use the mini-teleporter in Kleiner's lab repeatedly (roughly ten times) until it breaks.

Chapter 3: Route Kanal

Barnacle BowlingIn the canals, roll or shoot an explosive barrel into a group of five barnacles hanging together to kill them all with one blast.

Anchor's Aweigh!Reach the airboat at the end of the canals.

Chapter 4: Water Hazard

Heavy WeaponsPick up the airboat's mounted gun.

Revenge!Destroy the hunter-chopper that chases you down the river.

VorticoughFind the hidden cave with the singing, coughing Vortigaunt near the end of the chapter.

Chapter 5: Black Mesa East

Zero-Point EnergyReceive the Gravity Gun from Alyx.

Blast from the PastFind the HEV suit charger faceplate on a ledge in Eli's scrapyard, near the airlock back to the power plant. Stack crates to reach it, or pull it in with the Gravity Gun.

Two PointsUse Dog's ball and the Gravity Gun to shoot it through the basketball hoop on the far wall of the scrapyard.

Chapter 6: "Ravenholm"

Hallowed GroundEscort Father Grigori safely through the church cemetery fight.

Zombie ChopperPlay through the entire Ravenholm chapter using only the Gravity Gun. Switching weapons is fine as long as you never swing the crowbar or fire anything else; using Grigori's traps is also safe.

Chapter 7: Highway 17

OSHA ViolationUse the electromagnetic shipping crane to kill three Combine soldiers.

Targetted AdvertisingUse the crossbow's scope to pin a soldier to the billboard visible from the hill where you first find the crossbow.

Where Cubbage Fears to TreadDefend Little Odessa from the gunship attack; this happens automatically as part of the story.

One Man ArmyDestroy a total of six gunships over the course of the game. There are plenty of opportunities between here and the end, so this can be finished later if you're short.

Chapter 8: Sandtraps

Keep Off the Sand!Cross the antlion beach without ever touching the sand, from the two stranded resistance members to the cliff before the antlion guard fight. Use props as stepping stones and take it slow; even a faint rumble means you touched the sand.

Bug HuntUse bugbait to direct antlions to kill a total of 50 enemies. Progress carries across the relevant chapters as long as it's the same playthrough.

Chapter 9: Nova Prospekt

FlushedGrab a toilet with the Gravity Gun and kill an enemy with it. Easiest done in Nova Prospekt, but it's also possible earlier in Eli's scrapyard or later in Anticitizen One.

Hack Attack!Grab a live manhack with the Gravity Gun and use it to kill a total of five enemies, thrown or held as a melee weapon. Kills accumulate across manhacks, so you don't need five from one.

Chapter 9a: Entanglement

Warden FreemanSurvive the second turret standoff in Nova Prospekt.

Chapter 10: Anticitizen One

Radiation Levels DetectedMake it through the toxic, radioactive tunnel under City 17.

Plaza DefenderSurvive the generator plaza standoff.

Follow FreemanGain command of a squad of rebels during the City 17 uprising.

Chapter 11: "Follow Freeman!"

Counter-SniperKill every Combine sniper in City 17, mostly by throwing grenades into the windows they're firing from.

Fight the PowerShut down the suppression device by disabling all of its generators.

Giant KillerSurvive the rooftop strider battle in the ruins of City 17.

Chapter 12: Our Benefactors

AtomizerUsing the charged Gravity Gun, throw a total of 15 Combine soldiers into Combine ball fields to disintegrate them.

Chapter 13: Dark Energy

Singularity CollapseDestroy the Citadel's reactor core to finish the game.

Lambda Locations

Lambda Location #1Chapter 2: "A Red Letter Day". Just inside the entrance Alyx opens for you, slightly to the right; you'll likely pick it up automatically as you walk in.

Lambda Location #2Chapter 3: Route Kanal. Just after that room, in the first radioactive water area, cross the pipes to the right side to reach it.

Lambda Location #2Chapter 3: Route Kanal. After jumping across to the building where you wait for a train, it's to your left as you enter.

Lambda Location #2Chapter 3: Route Kanal. In the air vent you have to crawl through almost immediately after; there's no way to miss it.

Lambda Location #2Chapter 3: Route Kanal. Hop on top of the red van to the left, just before your second barnacle encounter, and duck into the rubble.

Lambda Location #2Chapter 3: Route Kanal. Through the grate below the room you enter after being shot at by a helicopter for the first time; take the ladder to your right down to it.

Lambda Location #2Chapter 3: Route Kanal. Continue underneath the big orange pipe instead of dropping into the dark hole to the right at the end of it.

Lambda Location #2Chapter 3: Route Kanal. Stay on the upper level of the curved room you climb a ladder into, all the way to the end.

Lambda Location #9Chapter 4: Water Hazard. Head up the left side of the V-shaped canal with the reddish-orange buildings, towards the far end.

Lambda Location #9Chapter 4: Water Hazard. Just past the barn, where a dropship drops Combine in your path, the leftmost of two pipe entrances on the right is open; use a barrel to climb up and inside.

Lambda Location #9Chapter 4: Water Hazard. Just before the big red barn, once the water clears up again, stop the boat and look right for a ladder leading up to it.

Lambda Location #9Chapter 4: Water Hazard. In an easy-to-miss square room with scaffolding on the left, just before the stretch where you cross the top of some pipes.

Lambda Location #9Chapter 4: Water Hazard. There are two chances at this one: in front of some stairs you climb to jump across containers, or (if you miss that) underneath a bridge with a parked train, just past the point where the helicopter returns fully repaired.

Lambda Location #9Chapter 4: Water Hazard. Just after entering an area filled with rubble, solve the small counter-weight basket puzzle before bashing through the wood to continue.

Lambda Location #9Chapter 4: Water Hazard. There are two chances at this one: a hard-to-spot ladder up to a corner platform between two turbines just before the gate opens, or (if you miss that) a small grate below the second rocket-launching car later on.

Lambda Location #9Chapter 4: Water Hazard. At the very top of the big red barn, in a mechanism jammed with a barrel that only the crowbar can free; the items that drop outside are the cache.

Lambda Location #9Chapter 4: Water Hazard. In a dead-end area with a windmill, off to the right at a fork in the canal.

Lambda Location #9Chapter 4: Water Hazard. Just after that, make an almost U-turn to the left into a dark area, avoiding the boards marked with red X's.

Lambda Location #19Chapter 5: Black Mesa East. At the ladder you use to get out of the boat for the last time; you likely picked it up automatically just by passing near it.

Lambda Location #20Chapter 6: "We Don't Go to Ravenholm...". In the area with the car traps, ride a car up and jump over the fence marked with the symbol.

Lambda Location #20Chapter 6: "We Don't Go to Ravenholm...". Take a left turn instead of a right after dropping down to the road and climbing the ladder at the far end.

Lambda Location #20Chapter 6: "We Don't Go to Ravenholm...". Above the exit as you step out into daylight at the very end of the chapter.

Lambda Location #20Chapter 6: "We Don't Go to Ravenholm...". Hop on top of one of the green generators, just after first meeting Father Grigori, and go through the vent.

Lambda Location #24Chapter 7: Highway 17. Inside the first building in this map segment, next to the first thumper.

Lambda Location #24Chapter 7: Highway 17. Behind a fenced fuel tank across the road from the billboard used for Targetted Advertising; shooting below the tank to break the crate open works without going inside.

Lambda Location #24Chapter 7: Highway 17. Stick to the left wall entering this segment; it's in the rocky area with some headcrabs, just before the hill leading up to the famous bridge.

Lambda Location #24Chapter 7: Highway 17. In the red building on the left, just after your first jump and before your first tunnel.

Lambda Location #24Chapter 7: Highway 17. In a blue van on the left, just past the pile of wrecked cars where you fight your second gunship.

Lambda Location #29Chapter 8: Sandtraps. Partway across the antlion beach, toss a grenade or rocket up onto the white building above the second red building to knock it loose.

Lambda Location #29Chapter 8: Sandtraps. In the house with the car batteries, look up into the small gap above the bathroom ceiling and pull it down with the Gravity Gun or a thrown object.

Lambda Location #31Chapter 9: Nova Prospekt. After unplugging the machine the Vortigaunt is strapped to and opening the gate, continue straight ahead through the door instead of turning; the symbol is directly across the room.

Lambda Location #31Chapter 9: Nova Prospekt. In a room behind locked doors just before the next map segment, in the A5 sector; smash the boards blocking the window to get in.

Lambda Location #31Chapter 9: Nova Prospekt. Jump the railing to the right in the laundry room.

Lambda Location #34Chapter 9a: Entanglement. On top of the Dr. Breen's Private Reserve vending machine on the left, while waiting for Alyx to open the first gate.

Lambda Location #35Chapter 10: Anticitizen One. Tucked in a corner as you make a U-turn back onto the road, after passing through a sidewalk with windows on your right.

Lambda Location #35Chapter 10: Anticitizen One. Behind a gate reached by going up the stairs instead of down the hall towards the next map segment, past the turret-guarded hole in the wall.

Lambda Location #35Chapter 10: Anticitizen One. Tucked behind a large reddish building slightly above the exit, at the top of a slow-moving lift you ride and climb.

Lambda Location #35Chapter 10: Anticitizen One. In a small red shack on the left in the alleyway where Combine start appearing in windows; remove the metal prop blocking it.

Lambda Location #35Chapter 10: Anticitizen One. In a tiny hole on your right, past some zombies fighting Combine at the bottom of a sewer-like area; suck the supplies out with the Gravity Gun.

Lambda Location #35Chapter 10: Anticitizen One. Immediately outside, pile up some objects to get behind the fence behind the blue dumpster on the right.

Lambda Location #35Chapter 10: Anticitizen One. Step outside through a wood-rimmed doorway (instead of continuing left up the stairs) after a large combine-vs-zombie battle, then look in the dark area on your left.

Lambda Location #35Chapter 10: Anticitizen One. In the room just before the first bridge you lower yourself, on the left; it's hard to miss.

Lambda Location #35Chapter 10: Anticitizen One. Just past the previous cache, continue past three metal pylons to the end instead of climbing the nearby ladder.

Lambda Location #35Chapter 10: Anticitizen One. At the bottom of a stairwell full of catwalks, below the metal door you remove a bar from to continue.

Lambda Location #45Chapter 11: "Follow Freeman!". In a hallway almost directly in your path, just before the final map segment where a strider chases you down a tunnel.