Blendin’s Game relates the story of Blendin Blandin’s revenge on Dipper and Mabel Pines, and the secret reason why Soos hates his birthday!
It turns out that Blendin was imprisoned for his mishandling of Dipper and Mabel’s time mischief, so he invokes Globnar – a gladiatorial combat where the winner receives a coveted Time Wish, and the loser is killed OR WORSE! Blendin hopes to erase Dipper and Mabel from history with his wish so his life wouldn’t be ruined.
Meanwhile, it’s revealed in Blendin’s Game that Soos hates his birthday because that’s the day he realized that his father had left town and will never return. Ten years ago Soos received a postcard from his father on his twelfth birthday – the 8th year in a row of missed birthdays!