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Archived store pages for TF2 Chess Set:
https://web.archive.org/web/20160603170729/https://www.thinkgeek.com/product/1286/
https://web.archive.org/web/20160523044118/http://store.valvesoftware.com:80/product.php?i=BGTF001
Chess set unboxing and Grandmaster hat activation:
https://www.youtube.com/watch?v=r9mtDHj8Bt0
Grandmaster hat showcase:
https://www.youtube.com/watch?v=5djC7RUDRuY
TF2 official wiki article:
https://wiki.teamfortress.com/wiki/Grandmaster
https://web.archive.org/web/20160603170729/https://www.thinkgeek.com/product/1286/
https://web.archive.org/web/20160523044118/http://store.valvesoftware.com:80/product.php?i=BGTF001
Chess set unboxing and Grandmaster hat activation:
https://www.youtube.com/watch?v=r9mtDHj8Bt0
Grandmaster hat showcase:
https://www.youtube.com/watch?v=5djC7RUDRuY
TF2 official wiki article:
https://wiki.teamfortress.com/wiki/Grandmaster
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Underneath the RED spawn on the Banana Bay are two conveyor belts that appear to be used for converting dozens of bananas into Australium bars.
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The Scout exclusive taunt, The Carlton, is based of the character Carlton Banks from the TV show The Fresh Prince of Bel-Air, in which the character preformed the exact dance named after himself.
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During the 2012 Pyromania update, animations of all nine classes burning alive were added to the game and never used. It is unknown why this was done.
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There are 5 unused death sounds in the games files for the scrapped Civilian class.
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Three of the Heavy's cosmetic items: "Carl", "Aqua Flops" and "Hunger Force" are all references to Carl Brutananadilewski from the Adult Swim TV show Aqua Teen Hunger Force.
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The Gun Mettle update included a new taunt called the Kazotsky Kick, which lets the player perform a Ukrainian 'Hopak' dance. While the taunt is active a song will play, which was first heard in the Counter Strike: Global Offensive map "de_train". However, the version that accompanies the taunt features more instruments, has vocal chanting, and is about 1.2 times faster.
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The first is a yellow duck which isn't used in any of the styles.
Interestingly the second skin isn't implemented in the model, but the texture remains for it. It's set up to be paintable, and includes the phrase "Lets Eat!!!", a reference to the character Chica from Five Nights at Freddy's.
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"The Southern Hospitality" is a community created weapon, which was released in the Engineer update. Shortly after the Mann-conomy update and the release of the Mann Co. store (where players can buy items for the game and their creators receive some money for it), the creator sent a thank-you letter to Valve co-founder Gabe Newell. He responded to this by buying 10,000 Southern Hospitality's from the Mann Co. store.
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In the Team Fortress 2 short film "The Spoils of Love and War", during the scene in which the Pyro and Soldier are playing Rock Paper Scissors, there is a blueprint in the background of a capsule-shaped robot on a single wheel. This robot is the same as those used in the "Asteroid" map for the Robot Destruction game mode.
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