Valve Corporation

Background
Valve Corporation, also known as Valve Software, is an American video game developer and distributor that was founded in 1996 in Bellevue, Washington by former Microsoft employees Gabe Newell and Mike Harrington. They are best known for their 1998 debut product Half-Life and its sequels, the Source engine used for production of their games, and the Steam digital distribution platform. They are also known for the Counter-Strike series, the Team Fortress series, the Left 4 Dead series, and the Portal series.

1st Logo (1998)
Nickname: "The Valve"

Logo: We zoom in over the exterior of a big dark gray building (sort of like a jail or factory), and go through one of the windows. We see a shirtless bald man wearing long pants (mrvalve.mdl) getting ready to pull a lever that starts up a letterpress-esque machine. He puts his profile on the base and when the press (which has the Valve logo on it) goes over his head, it plants a dark red valve (spiggot.mdl) on the side of his head. He gets up, strangely without any ache or pain whatsoever as if nothing happened.

FX/SFX: GoldSrc animation. The map, titled "valve.bsp", was designed by Greg Coomer. Steve Theodore designed the models, and Doug Wood provided the animations. This concept, "Open Your Mind", was eventually used in-game in 2006.

Music/Sounds/Trivia: "Hazardous Environments", a song composed for the company's first video game, Half-Life. It's hard to hear it without headphones or listening closely, however. Associating factory background sounds can also be heard.

Availability: It was only used as a tech demo for the GoldSrc engine.

Editor's Note: Nice animation showcasing the GoldSrc engine, although the concept can scare people off.

2nd Logo (November 19, 1998-November 16, 2004)
Nicknames: "Open Your Eyes", "(Scary) Valve Man", "The Valve II", "Maimed Mike"

Logo: On a black background, we see a fading-in sepia tone picture of a young man with black slick back hair with a goatee looking at the camera with a valve sticking out of his left eye. After the picture fades in, an box outline fades in in the bottom right corner of the picture, containing the word "VALVE" where the "E" is a superscript. Both the picture and the text then fade out slightly faster than the speed they faded in.

Trivia: The man in the picture was a former Valve employee (possibly Mike Harrington). Both this picture of the man and the picture used in the next logo were taken between 1995 and 1996. The concept for this logo is "Open Your Eyes".

Variant: Starting in 2004 with the release of Half-Life 2, the color of this logo has been toned down from its original sepia, the fade-in and fade-out are smoother, "trembling" effects are added to the photo and copyright stamps follow the fade-out.

FX/SFX: The picture and text fading in and out, the intentional choppiness.

Music/Sounds: A fragment of Hazardous Environments plays.

Availability: Rare.
 * Seen on the non-Steam, original CD versions of Half-Life and Counter-Strike. The color down-toned variant is seen on the original Half-Life 2.
 * Sadly, Steam versions of Half-Life 2 use the next logo, while Steam versions of Half-Life and Counter-Strike have no logo at all. However, the logo can be seen after the credits of Half-Life 2: Episode One, just before a trailer for Half-Life 2: Episode Two, on both the original CD and Steam versions (though it can't be seen on the PS3 and 360 versions, included in The Orange Box since the trailer is omitted from those versions).
 * Can also be seen on the Xbox versions of Half-Life 2, Counter-Strike, and Codename Gordon.
 * This logo was going to be used in Counter-Strike: Condition Zero (as evidenced by this logo's AVI file inside the game's directory), but never ended up being used for some reason.

Editor's Note: The concept is creative, but the picture of the man along with the disturbing, ominous music can unnerve many players, although this was arguably intentional. However, this logo is a favorite of many.

3rd Logo (June 1, 2006-)
Nicknames: "Open Your Mind", "(Scary) Valve Man II", "The Valve III", "Coach from Left 4 Dead 2"

Logo: On a black background, we see a fading-in sepia tone picture of a man's bald head (with most of his head and face silhouetted by darkness) with a valve sticking out of it. Similar to the previous logo, after the picture fades in, an box outline fades in in the bottom right corner of the picture, containing the word "VALVE" where the "E" is a superscript. Both the picture and the text then fade out slightly faster than the speed they faded in. On some games, the logo is followed by another logo saying "powered by source" (Valve's game engine) with an symbol surrounding the "e" and copyright stamps below.

Trivia: The man in the picture was randomly picked off of the street to pose for this picture. His name was never verified. This logo's concept was "Open Your Mind".

Variant: On the Counter-Strike: Global Offense beta, Dota 2, and the Steam version of Portal 2 (after the Perpetual Testing Initiative DLC release in May 2012), the man in the picture (slightly more live-actioned) briefly turns his head towards the camera near the end of the logo before cutting back to normal. The picture also fades in and fades out at the same speed. In addition, the Valve print logo (with the box outline and the letters now in a color) doesn't fade into the picture or fade out with the picture, it instead fades in and out (via a "wipe" effect) by itself after the picture fades out. This will presumably be seen on future games from the company.

FX/SFX: Same as before, but the trembling effects are increased.

Music/Sounds: Same as before. On the variant, the music is edited.

Availability: Seen on all Valve games from Half-Life 2: Episode One onward. The "turning head" variant appears on the aforementioned games above.

Editor's Note:
 * Original Variant: Like its predecessor, the picture along with the disturbing, ominous music can unnerve many players, but this logo is nowhere near as freaky-looking as the first one was.
 * "Turning Head" Variant: Although this was arguably intentional, the once-still picture of the man now turning his head towards the camera is bound to surprise players used to the original variant as well as first-time viewers. The retained ominous music doesn't help matters.
 * As before, the concept is intentional and creative, and it is also a favorite of many.

4th Logo (VR Variant) (April 5, 2016-)
Nicknames: "Look Around", "Open Your World", "The Valve IV"

Logo: In a room filled with valves, we see the Valve logo in white and 3D. Everything that happens involves you looking around in your VR headset.

FX/SFX: You moving your head around with the VR headset. Otherwise, the whole room gradually lights up and smoke emerges. You can actually touch the valve that is hanging on the platform that you're standing on, but it doesn't do anything.

Music/Sounds: Eerie factory sounds, mixed with the same fragments of Hazardous Environments from the previous logos.

Availability: Seen on HTC Vive or Steam VR games made by Valve, such as The Lab. It is not seen on Half-Life: Alyx, instead being replaced with the next logo.

Editor's Note: The room may feel unwelcoming, but with you being able to look all around, most might find this to be a really cool logo.

5th Logo (VR Variant) (March 23, 2020-)
Nicknames: "Open Your Mind II", "(Scary) Valve Man III", "The Valve V"

Logo: Similar concept to the 3rd logo, now in 3D. In a dark room, we see the same bald guy from that logo fading in, however now in 3D and in a much darker environment. A box is shown with the text "VALVE" with the E in superscript.

FX/SFX: Similar to the 3rd logo, however now in 3D and without the trembling effects. Really nice modeling work done on the logo.

Music/Sounds: Same as the third logo.

Availability: Brand new. First shown on Half-Life: Alyx and may be shown on newer VR games from Valve.

Editor's Note: Another great logo from Valve.