Remembering what happened in almost 70 episodes spread over seven years can be rough. Hopefully this will help you out.
'''Note: Astute gamers may infer spoilers from what is below. Everything is unmarked for ease of reading. You have been warned!'''
* Episode 0: Freeman goes through the training course. Stops at the "Jump to Target" part as he doesn't want to be injured.
[[folder:Black Mesa Inbound]]
* Episode 1: Freeman [[BlackMesaCommute rides the Tram to work]].
* Episode 2: Freeman finds his way down to work.
* Episode 3: Freeman arrives at the test chamber and starts the "green apocalypse".
* Episode 4: Makes his way out of test chamber.
* Episode 5: Freeman continues his way out of test chamber (to the lobby) and finds a pistol.
* Episode 6: Jumps in a sewer, takes a lift that takes a long-ass time to go down, and gets stuck at a walkway.
* Episode 7: Freeman plays Extreme Hopscotch.
* Episode 8: Encounters bugs, electricity, maintenance shafts and a machine gun turret.
* Episode 9: "'''Okay children, class is in session! Everybody take your seats! ''I said everybody take your seats!!'' Dammit Billy, that means you too!'''"
* Episode 10: Goes through a freezer section before finding a vending machine to get Doritos.
[[folder:"We've Got Hostiles"]]
* Episode 11: Freeman hops over lasers and finds an [=MP5=].
* Episode 12: The "rescue team" arrives.
* Episode 13: Freeman finally gets to the surface.
* Episode 14: Finds a shotgun, heads downward and takes a tram to a pool of "radioactive...crap".
* Episode 15: Arrives at the rocket testing engine.
* Episode 16: Freeman wanders around silos and spots a large fan.
* Episode 17: Returns to the rocket propulsion test chamber.
* Episode 18: Restores all power to the rocket engine.
* Episode 19: Finally fires rocket engine.
* Episode 20: Jumps down a smoking hole where the alien used to be.
* Episode 21: Encounters the large blue alien (Gargantua).
* Episode 22: Turns on the power generator for the tram.
* Episode 23: Freeman makes it back to track control, only to realize power is still "off".
* Episode 24: Defeats the Gargantua and gets the tram working.
[[folder:On a Rail]]
* Episode 25: Goes around in circles on the tram, encounters a machine gun turret and ends up at a broken elevator.
* Episode 26: Takes the tram back to the area with the crane and heads upwards (with the tram).
* Episode 27: Speaks like a pirate the entire episode.
* Episode 28: Loses his tram (thanks to Rocky the Rocket Ranger) and is stopped by explosives.
* Episode 29: Back on the surface.
* Episode 30: Launches satellite.
* Episode 31: Decides to head back down after being shot, takes another tram, and finds a big pool.
* Episode 32: Encounters shark-thing (Ichthyosaur).
* Episode 33: Bypasses the giant pistons and discovers he's being tracked.
* Episode 34: Ninjas, Gordon captured.
* Episode 35: Wakes up in trash compactor, can't remember who what he did yesterday.
* Episode 36: Wanders around the room full of canisters filled with the same radioactive crap, and gets lost.
* Episode 37: Finally remembers what happened.
* Episode 38: Rides conveyors.
* Episode 39: Passes through Bio Labs, stops in lobby.
* Episode 40: Enters area with four lasers that converge into one.
* Episode 41: Escapes Bio Labs, reaches Dam.
* Episode 42: Freeman maneuvers his damn way around a damn dam, some damn soldiers, and a damn shark. Damn.
* Episode 43: Runs around in circles while being harassed by helicopter.
* Episode 44: Cliff-climbing, a rickety bridge, and a rocket launcher. Finally takes down the helicopter from the last episode.
* Episode 45: Freeman is [[MajorGeneralSong the very model of a modern major general.]]
* Episode 46: Dodges falling debris, avoids landmines, theorizes about alien gravity and the benefits of an extra finger, meets the sniper from Episode 31 again.
* Episode 47: Stumbles through the trip-wire maze, shoots an alien weapon dead, laments his inability to hotwire a military vehicle, and gets pinned down by a "[[TanksButNoTanks tank]]".
* Episode 48: After blowing up the "tank", Freeman plans to become the Film/LordOfWar, plays air traffic controller with a rocket launcher, and teaches a guard about the importance of knocking before opening.
* Episode 49: Freeman displays his skill in "shotgun chess" amid [[MeleeATrois alien vs soldier]] combat, considers if he has murdered enough people to alter the course of the timeline, and gets told to put a well placed satchel charge in his pipe and smoke it.
* Episode 50: Gordon almost shotguns another security guard, is disappointed in his lack of stamina and self-preservation instinct, and finally uses him as a decoy to escape another Gargantua. He also needs an airstrike map of the whole world.
[[folder:"Forget About Freeman!"]]
* Episode 51: Freeman laments his OneManArmy status while navigating through Snark mines, only find himself at a dead end.
* Episode 52: Gordon ponders if he's taking the longest possible route through the facility while hopping in and out of water, avoiding mines, sharks, and automated guns while he and the military keep each other's life interesting. Also, more rockets, another dead tank, and a suspiciously quiet elevator.
* Episode 53: Freeman hopscotches around radiation, finds a tank, and ponders the rarity of stupid aliens in media and the possibility that humanity is just better at invading places, stopping at a hallway full of blood.
* Episode 54: Freeman vs. Ninjas 2: ElectricBoogaloo.
* Episode 55: As Gordon heads into the reactor core, he worries about guards that may have gone rogue.
* Episode 56: Freeman contemplates honor in battle as he prevents a nuclear meltdown.
* Episode 57: Freeman gets high off morphine as he discovers "portable stars".
* Episode 58: Freeman, still high, takes a detour into Half-Life: Uplink, where he thinks about the cover-up of the cover-up, hears his returning ghost, and realigns a radio antenna. The episode ends when he decides he can't fit through a small gap.
* Episode 59: Freeman sobers up, ponders the apparent growing intelligence of the zombies, experiences strange green flashes, then finds himself on the bad side of a Gargantua.
[[folder:Return to Lambda Core]]
* Episode 60: Freeman tortures some sorcerers, discovers that Black Mesa invented teleportation, falls twice, and ponders why the hell his department is performing teleportation experiments.
* Episode 61: Freeman gets through the teleporter puzzle, reunites with the Long Jump Module from Episode 0, goes through the portal to Xen but hears something from Shephard before he went through.
* Episode 62: Freeman finally makes it to Xen. He attempts to adjust and fails miserably.
* Episode 63: Freeman encounters and battles against Gonarch and laments about it being MadeOfIron.
* Episode 64: Freeman finds a new apartment, explores a cave, and almost falls to his death.
* Episode 65: Freeman evades monsters and encounters potential minions in alien hellworld #3.
* Episode 66: Freeman takes over one part of a factory and massacres the other parts.
* Episode 67: Freeman continues his conquest of Xen and desecrates alien religious icons.
[[folder:Nihilanth & Endgame]]
* Episode 68: Freeman fights the Nihilanth, plays around with lower gravity chambers, and meets the G-Man. Believing he's from the CIA, he wants to get pardoned, and accepts his offer. Then he doesn't, and has to fight a horde of G-Men. Final Episode (for now).
* Episode 10.5: Freeman messes up a jump, falls to his death.
* Doom Guy's Mind [[UnInstallment Episode 7]]: [[VideoGame/BrutalDoom Doom Guy]] resumes being [[TestosteronePoisoning hardcore]] as he murders demons and searches for key cards.
* Freeman Across the Universe: [[RealTrailerFakeMovie Coming soon]], Freeman enters every First-Person game ever made.
* Episode 61.5: Gordon teleports out of Black Mesa into a forest in an unknown location. He 'borrows' a jeep and drives out.