Gabe Newell Takeover

The Gabe Newell Takeover, also known as the Gabeover, was a channel event where Gabe Newell took over SiIvaGunner. It occurred on the twenty-fifth anniversary of Valve Corporation's founding. It was revealed in the video "The Bounty of Ol' Gabe Newell - The SiIvaGunner All-Star Summer Festival 2021".

Theme
The YouTube and Twitter account avatars were changed to a picture of Gabe, the YouTube channel banner was changed to an image of the Citadel from  in place of the lighthouse, and the channel description was changed to: Hi, this is Gabe Newell. Welcome to my SiIvaGunner takeover.

After 7 years in development, hopefully it will have been worth the weight.

Thanks, and have fun.

(All content is willingly submitted by a team of content creators; if you use a video for your content, please credit the channel, and do not monetize it if said content consists primarily of/is centered around the video in question.)

The Twitter account's name was changed to "Gabe Newell", the banner was changed to another picture of Gabe, and the location was changed to "Valve".

Additionally, during the event, places where the number 3 would appear in the metadata and thumbnail were replaced with the Source missing texture (or the ▚ symbol in text), referencing the "Valve can't count to 3" meme.

Rips uploaded
Most rips uploaded during this event were of games published by Valve, such as ', ', and , or featured songs from/related to them. Valve-related memes were also referenced, especially ones related to Gabe Newell. The catchphrase was changed to "Please let me know what you think after you've had a chance to read the channel description."

The event was initially foreshadowed four days prior with the video "cam_apsci_1532.avi", which was discovered after decoding a series of unlisted Portal rips referencing the Portal ARG, and contained the hidden message.

The event was split into three "episodes". No rips were uploaded for "Episode 3", save for "Credits - Gabe Newell Simulator" and "A Hard Day's Night - The Beatles: Rock Band", the closing rip for the takeover and a tie-in to the next event respectively, referencing the "Valve can't count to 3" meme.

August 24 ("Episode 1")

 * The Bounty of Ol' Gabe Newell - The SiIvaGunner All-Star Summer Festival 2021
 * Opening Sequence (Unused) - Garry's Mod
 * Trailer Theme - Gabe Newell Simulator
 * Dark Halls - Doom
 * Sharks - Action 52
 * Street Wise (Asura NTSC Version) - Tekken 5
 * Down Hill - Spore Galactic Adventures
 * Programmers' Computer - Robotrek
 * Diabolical Adrenaline Guitar - Half-Life
 * Cosplay - Negima!? Chou Mahora Taisen Chuu: Checkiin Zenin Shuugou! Yappari Onsen Kichaimashitaa
 * Robots FTW - Portal 2
 * Crocodile Cacophony (Beta Mix) - Donkey Kong Country 2
 * Circus (M ix Bad) - Five Nights at Freddy's
 * Seduce Me! (Beta Mix) - Team Fortress 2
 * Deep Underground - Robotrek
 * Password (Mega Man 2) (PC Version) - Mega Man Legacy Collection
 * We Like To Party - All-Star Baseball 2005
 * Access - Cave Story ▚D
 * Rocket Jump Waltz - Team Fortress 2
 * Donut Plains (Emulator Version) - Super Mario World
 * Odoru Pompokolin - DanceDanceRevolution 5thMIX
 * Steam Gardens (8-Bit) (Unused Version) - Super Mario Odyssey
 * Watch Out! (Alternate Version) - Maroon GO
 * Fifth of a Dime - Team Fortress 2 Classic
 * Valve Theme - Portal 2
 * Fucking In Heaven - Gran Turismo 2
 * BGM #02 - Das Geheimnis der Happy Hippo-Insel
 * You Wouldn't Know - LEGO Dimensions
 * Want You Gone (OST Version) - Portal 2
 * Rise of the Living Bread - Team Fortress 2
 * Fear Factory (Beta Mix) - Donkey Kong Country
 * Tank - Left 4 Dead
 * Dumb Ways to Die - Dumb Ways to Die
 * Surface Tension 2 - Black Mesa
 * Mirame Radio Through Wall - Counter-Strike: Source
 * Forget About Freeman - Black Mesa
 * Dungeon (Unused) (Kickstarter Demo) - Baldi's Basics Plus
 * Laning 2 (deadmau5 dieback music pack) - DOTA 2
 * Turret Wife Serenade (OST Version) - Portal 2
 * Big Shot's Theme (Extended Mix) - MOTHER ▚
 * Soldier of Dance (Beta Mix) - Team Fortress 2
 * Last Legs - Half-Life 2: Episode Two
 * Your Team Won (Alpha Mix) - Team Fortress 2
 * Left 4 Dead (Main Theme) - Left 4 Dead
 * Right Behind You (Xbox ▚60 Version) - Team Fortress 2
 * Valve Theme (Intro) - Half-Life
 * Radio - Portal
 * Human Highway - WALL-E
 * fuse.ogg - Minecraft
 * Main Theme - Super Mario Kart
 * Hazardous Environments - Half-Life 2
 * Super Mario Bros. Music - Underwater (NTSC Version)
 * All-Star Theme (Team Fortress) - Sonic & All-Stars Racing Transformed
 * Bacterias - Left 4 Dead 2
 * Miss Minnie - Hotline Miami 2: Wrong Number
 * Aperture Jingle - Portal 2
 * Roving Tank (In-Game Version) - EarthBound Beginnings/MOTHER
 * You Will Be Perfect - Portal 2
 * Underground - Mari0
 * MEDIC! (OST Version) - Gang Garrison 2
 * Valve Theme (JP Mix) - Half-Life
 * Course Clear (Alternate Mix) - Super Mario Bros. ▚
 * Stop a Gaben - Gabe Newell Simulator

August 25 ("Episode 2")

 * aliens1 - Bergle
 * Password (Emulator Version) - Godzilla - Monster of Monsters!
 * Illusionary Night ~ Ghostly Eyes - Touhou 8: Imperishable Night
 * Science is Fun - Portal 2
 * Steam Sale Encore - Gabe Newell Simulator
 * BGM 01 - Battle Royale
 * Ohayou Sayori! (Extended Version) - Doki Doki Literature Club!
 * Ultimate Koopa - Super Mario 64 DS
 * Theme Song - Caillou
 * Military Precision (Beta Mix) - Half-Life
 * "OK desu ka?" (Lambda Mix) - EarthBound
 * Still Alive (Orange Box Release) - Portal
 * Lacunosa Town (Alpha Mix) - Pokémon Black & White
 * DK Rap (Donkey Konk) - DKTV
 * Girl Picture - Block Gal
 * Super Mario ▚D All-Stars Music SMS Secret Course Sky & Sea
 * Surface Tension 1 - Black Mesa
 * Alphys (Unused Version) (Alpha Mix) - Undertale
 * Your Team Won (RED Version) - Team Fortress 2
 * Space Ocean - Half-Life
 * Don't Do It (Plug Me In!) - Portal 2
 * Team Fortress 2 (Main Theme) (In-Game Version) - Team Fortress 2
 * Robots FTW (OST Version) - Portal 2
 * Guts Man Stage (Steam Version) - Mega Man Legacy Collection
 * The Friendly Faith Plate (In-Game Version) - Portal 2
 * Left for Death - Left 4 Dead 2
 * Main Menu (Beta Mix) - Counter-Strike: Global Offensive
 * Turret Wife Serenade (Beta Mix) - Portal 2
 * The Monsters Without (Beta Mix) - Left 4 Dead
 * It Hates Me So Much (PS▚ Version) - Team Fortress 2
 * Title - Dad'n Me
 * Wheatley Science - Portal 2
 * Subject Name Here - Portal
 * A Little Heart to Heart (Delta Variant) - Team Fortress 2
 * Troika Retro - Tetris DS (THQ) (Unreleased)
 * The Friendly Faith Plate (Alpha Mix) - Portal 2
 * Turret Wife Serenade (In-Game Version) - Portal 2
 * Route 201 (Night) (Alpha Mix) - Pokémon Diamond & Pearl
 * Invincible Candy (OST Version) - Kirby Super Star Ultra
 * Machiavellian Bach - Portal 2
 * Internal Conflict - Black Mesa
 * Trainers' Eyes Meet (Backpacker) (Alpha Version) - Pokémon Black & White
 * Upgrade Station (Unused) - Team Fortress 2
 * Main Theme - Meadow
 * SK Knuckles the Echidna (Alpha Mix) - Sonic The Hedgehog ▚ & Knuckles
 * Ghost Grounds (PAL Version) - Kirby: Canvas Curse
 * Oreburgh City (Day) (PAL Version) - Pokémon Diamond & Pearl
 * Masked Dedede (NA Version) - Kirby Super Star Ultra

August 26 ("Episode 3")

 * Credits - Gabe Newell Simulator
 * A Hard Day's Night - The Beatles: Rock Band