On December 23, he released his first mixtape Bad Season.which was later released in retail CD form with a modified track list and without DJ Scream. In October, he released his second EP Seepage. Later that year, Yates released his third Collabos album, The Gates Mixed Plate. album was released in 2010 as The Lost Scripts of K.O.D. An EP of new songs over unused beats from the K.O.D. The album featured a dark overtone, as Yates was dealing with the illness of his mother. That October, he released K.O.D., an acronym for King of Darkness. Yates later performed at the Rock The Bells 2009 Festival and the tenth annual Gathering of the Juggalos. In 2009, Yates and label mate Krizz Kaliko appeared in a promotional video for the Fight Night Round 4 video game. Several of Yates' songs are featured in the video games Madden NFL 2006, The Crew, EA Sports MMA, 25 To Life, WWE 2K18, EA Sports UFC 3, and Midnight Club: Los Angeles, in the latter of which Yates is an unlockable character. On November 25, 2015, Tech released "Shine", a song for the Jaco Pastorius documentary, Jaco. Yates starred in the musical "Alleluia: The Devil's Carnival", which had a limited theater release July 2015. Yates also appears as an actor in the films Vengeance and Night of the Living Dead: Origins 3D. In 2009, his song "Let's Go" was used in an online promotional short film for AXE body spray. Yates was originally set to score the entire film Alpha Dog, but the studio decided to replace some of his music with more commercially known songs. Yates' songs have appeared in the films Born 2 Race, Gang Related, Alpha Dog, Our Heroes: The 25 Best Black Sports Movies (Ever), and The Life of Lucky Cucumber. That just means I was right." Yates released his second Collabos album, Sickology 101, in April 2009. I'm not even a bit surprised, I'm happy about it. I've been celebrating for the last two days because that's a hell of an accomplishment. Yates remarked of the accomplishment that, "It just reminded me of all the work we'd done in the past, up until now I don't think it's sunken in yet. That September, he exceeded one million album sales over his entire catalog. The following year, Yates released the album Killer. In late 2014, Yates appeared on Wild n Out as captain of the Black Team. On June 24, 2014, Tech N9ne appeared on Jimmy Kimmel Live! to perform "Fragile", "He's A Mental Giant", and "Stamina". In 2013, Tech N9ne's song "Demons" appeared in the pilot episode of Ironside. In 2012, Tech N9ne appeared on the MTV game show Hip Hop Squares for three episodes. Yates also appeared on the 2011 BET Hip Hop Awards in the BET Cypher with B.o.B, Machine Gun Kelly, Kendrick Lamar, and Big K.R.I.T. His song "Riot Maker" was used as the official theme song for Total Nonstop Action Wrestling's 2010 Hardcore Justice pay-per-view. Cyborg, MMA fighter Gilbert Melendez entered the arena to Tech N9ne's 2006 song "The Beast" for his bout with Mitsuhiro Ishida. On the AugStrikeforce event, Strikeforce: Carano vs. In 2008, his song "Earthquake" was featured on an episode of MTV's America's Best Dance Crew in which the crew had to visually convey the title of the song in their performance. Yates' music has appeared on the television shows Dark Angel, I'm From Rolling Stone, My Super Sweet 16, The Hills, Spike Guys' Choice Awards, and Warren The Ape.