In the early 2000s, Griffin created games using [[Game Maker]], but struggled to find “a competent, hard-working and honest [[artist]] to work alongside”.<ref name=”interview” /> [[Pixel art|Pixel artist]] Jason Gordy teamed up with Griffin in 2004 to work on ”Wanderlust: The Online Adventure”, which was cancelled two years later due to a lack of direction.<ref name=”interview” /> Griffin and Gordy later formed Team Wanderlust,<ref name=”interview” /> later renamed to Yeti Trunk.<ref name=”about” /> The team worked on a new game titled, ”Wanderlust: Rebirth”,<ref name=”interview” /><ref name=”rock”>{{cite web |url=https://www.rockpapershotgun.com/rebirth-reborn-wanderlust-adventures |title=Rebirth Reborn: Wanderlust Adventures |author=Adam Smith |date=June 20, 2014 |website=[[Rock Paper Shotgun]] |access-date=October 3, 2025}}</ref> a game set to “closer resemble their vision for the ”Wanderlust” universe”; ”Wanderlust: Rebirth” released on June 14, 2011.<ref name=”about”>{{cite web |title=About YetiTrunk |website=YetiTrunk |url=https://yetitrunk.com/about.php |access-date=2 October 2025}}</ref> Griffin and Gordy released three more games over the next few years: ”Gubs” (2012),<ref name=”about” /> ”Puck Bang” (2013),<ref name=”about” /> and ”Wanderlust Adventures” (2015).<ref name=”rock” /><ref name=”rain”>{{cite web |url=https://operationrainfall.com/2014/01/24/publisher-spotlight-chucklefish-games/ |title=PUBLISHER SPOTLIGHT: Chucklefish Games |author=Tyler Lubben |date=2014-01-24 |website=[[Operation Rainfall]]|access-date=October 3, 2025}}</ref> The company [[Chucklefish]] published Yeti Trunk’s ”Wanderlust Adventures”.<ref name=”rock” /><ref name=”rain” /> Following this, Griffin helped work on games Chucklefish partnered with, such as ”Risk of Rain” (2013),<ref name=”lethcode”>{{Cite web |last=Hopoo Games |date=July 13, 2013 |title=Risk of Rain: Online Co-op! |url=http://riskofraingame.com/risk-of-rain-online-co-op/ |url-status=dead |archive-url=https://archive.today/20140320213121/http://riskofraingame.com/risk-of-rain-online-co-op/ |archive-date=March 20, 2014 |access-date=March 31, 2022 |website=Hopoo Games}}</ref><ref name=”lethcode2″>{{Cite web |url=https://www.co-optimus.com/article/10481/sci-fi-rogue-like-risk-of-rain-to-get-online-co-op.html |title=Sci-fi Rogue-Like Risk of Rain to Get Online Co-Op |author=Jason Love |date=2013-07-13 |website=Co-Optimus |access-date=2025-10-03}}</ref> and ”Witchmarsh” (TBA).<ref name=”fish” /> For ”Risk of Rain”, he worked on developing the game’s online multiplayer element.<ref name=”lethcode” /><ref name=”lethcode2″ /> As of February 2012, he is also a full-time teacher and [[tutor]].<ref name=”interview” />
In the early 2000s, Griffin created games using [[Game Maker]], but struggled to find “a competent, hard-working and honest [[artist]] to work alongside”.<ref name=”interview” /> [[Pixel art|Pixel artist]] Jason Gordy teamed up with Griffin in 2004 to work on ”Wanderlust: The Online Adventure”, which was cancelled two years later due to a lack of direction.<ref name=”interview” /> Griffin and Gordy later formed Team Wanderlust,<ref name=”interview” /> later renamed to Yeti Trunk.<ref name=”about” /> The team worked on a new game titled, ”Wanderlust: Rebirth”,<ref name=”interview” /><ref name=”rock”>{{cite web |url=https://www.rockpapershotgun.com/rebirth-reborn-wanderlust-adventures |title=Rebirth Reborn: Wanderlust Adventures |author=Adam Smith |date=June 20, 2014 |website=[[Rock Paper Shotgun]] |access-date=October 3, 2025}}</ref> a game set to “closer resemble their vision for the ”Wanderlust” universe”; ”Wanderlust: Rebirth” released on June 14, 2011.<ref name=”about”>{{cite web |title=About YetiTrunk |website=YetiTrunk |url=https://yetitrunk.com/about.php |access-date=2 October 2025}}</ref> Griffin and Gordy released three more games over the next few years: ”Gubs” (2012),<ref name=”about” /> ”Puck Bang” (2013),<ref name=”about” /> and ”Wanderlust Adventures” (2015).<ref name=”rock” /><ref name=”rain”>{{cite web |url=https://operationrainfall.com/2014/01/24/publisher-spotlight-chucklefish-games/ |title=PUBLISHER SPOTLIGHT: Chucklefish Games |author=Tyler Lubben |date=2014-01-24 |website=[[Operation Rainfall]]|access-date=October 3, 2025}}</ref> The company [[Chucklefish]] published Yeti Trunk’s ”Wanderlust Adventures”.<ref name=”rock” /><ref name=”rain” /> Following this, Griffin helped work on games Chucklefish partnered with, such as ”Risk of Rain” (2013),<ref name=”lethcode”>{{Cite web |last=Hopoo Games |date=July 13, 2013 |title=Risk of Rain: Online Co-op! |url=http://riskofraingame.com/risk-of-rain-online-co-op/ |url-status=dead |archive-url=https://archive.today/20140320213121/http://riskofraingame.com/risk-of-rain-online-co-op/ |archive-date=March 20, 2014 |access-date= , |website=Hopoo Games}}</ref><ref name=”lethcode2″>{{Cite web |url=https://www.co-optimus.com/article/10481/sci-fi-rogue-like-risk-of-rain-to-get-online-co-op.html |title=Sci-fi Rogue-Like Risk of Rain to Get Online Co-Op |author=Jason Love |date=2013-07-13 |website=Co-Optimus |access-date=2025-10-03}}</ref> and ”Witchmarsh” (TBA).<ref name=”fish” /> For ”Risk of Rain”, he worked on developing the game’s online multiplayer element.<ref name=”lethcode” /><ref name=”lethcode2″ /> As of February 2012, he is also a full-time teacher and [[tutor]].<ref name=”interview” />
In June 2015, Chucklefish brought on Griffin as a publishing manager.<ref name=”fish”>{{Cite web |date=June 26, 2015 |title=Say hello to Matt! |url=https://chucklefish.org/blog/say-hello-to-matt/ |website=Chucklefish|access-date=2 October 2025 |last=Chucklefish}}</ref><ref name=”2024i”>{{cite web |title=Unfiltered Gaming Conversation with Matthew Griffin (Leth) |url=https://www.youtube.com/watch?v=SZ9GI8HlQZo |via=[[YouTube]] |last=Relyea |date=September 18, 2024 |access-date=October 3, 2025}}</ref> At Chucklefish, he helped publish and market the two games ”Interstellia” (2015)<ref name=”2024i” /><ref name=”tc” /> and ”[[Stardew Valley]]” (2016).<ref name=”2024i” /><ref name=”tc” /> Griffin later left Chucklefish,<ref name=”2024i” /> and in July 2016, Australian indie developer Team Cherry brought him on as their marketing and publishing manager for their then-upcoming [[Kickstarter]]-backed title, ”[[Hollow Knight]]” (2017).<ref name=”2024i” /><ref name=”tc”>{{Cite web |last=Team Cherry |date=July 5, 2016 |title=NEW ADDITION TO THE TEAM, AND RELEASE UPDATE |url=https://www.teamcherry.com.au/blog/new-addition-to-the-team-and-release-update |website=Team Cherry |access-date=2 October 2025}}</ref> He also led the localization of the game,<ref name=”2020i” /><ref name=”2023i” /> [[playtest]]ed it,<ref name=”2020i” /><ref name=”2023i” /> and [[voice act|voice acted]] some characters.<ref name=”2023i” /> He continued his partnership with Team Cherry for their next game, ”[[Hollow Knight: Silksong]]” (2025).<ref name=”delay”>{{cite web|url=https://www.gamespot.com/articles/hollow-knight-silksong-has-been-delayed/1100-6513963/|work=[[GameSpot]]|title=Hollow Knight: Silksong Has Been Delayed|last=Howard|first=Jessica|date=10 May 2023|accessdate=October 2, 2025|archive-date=20 September 2023|archive-url=https://web.archive.org/web/20230920045353/https://www.gamespot.com/articles/hollow-knight-silksong-has-been-delayed/1100-6513963/|url-status=live}}</ref> For ”Silksong”, Griffin managed marketing and publishing, helped playtest the game,<ref name=”2023i”>{{Cite web |title=Interviewing Leth from Team Cherry |url=https://www.youtube.com/watch?v=pDSVnMEV3K8 |last=BlueSR |via=[[YouTube]] |date=August 19, 2023 |access-date=October 2, 2025}}</ref> and voice acted.<ref name=”2023i” /> He also gave updates on the game’s development over the years,<ref name=”delay” /><ref>{{cite web |last=Cryer |first=Hirun |title=Five years after it was announced, Hollow Knight: Silksong devs assure rabid fans they are “still hard at work on the game” |url=https://www.gamesradar.com/five-years-after-it-was-announced-hollow-knight-silksong-devs-assure-rabid-fans-they-are-still-hard-at-work-on-the-game/ |website=[[GamesRadar+]] |date=14 February 2024 |access-date=October 2, 2025|url-status=live }}</ref><ref>{{Cite news |last=Nightingale |first=Ed |date=20 January 2025 |title=Hollow Knight: Silksong is ‘real, progressing and will release’, says Team Cherry |url=https://www.eurogamer.net/hollow-knight-silksong-is-real-progressing-and-will-release-says-team-cherry |access-date=October 2, 2025 |work=[[Eurogamer]] |archive-date=5 February 2025 |archive-url=https://web.archive.org/web/20250205112408/https://www.eurogamer.net/hollow-knight-silksong-is-real-progressing-and-will-release-says-team-cherry |url-status=live }}</ref> and revealed information,<ref>{{Cite web |last=Cryer |first=Hirun |date=June 16, 2020 |title=A New Hollow Knight: Silksong Character Was Revealed Through a Discord Riddle — “Huntress.” |url=https://www.vg247.com/a-new-hollow-knight-silksong-character-was-revealed-through-a-discord-riddle |website=VG247 |access-date=October 2, 2025}}</ref><ref name=”ShacknewsDenzer”>{{Cite web |last=Denzer |first=TJ |date=April 8, 2025 |title=Hollow Knight: Silksong is still coming to the original Switch |url=https://www.shacknews.com/article/143822/hollow-knight-silksong-switch-1 |website=[[Shacknews]] |access-date=2025-10-03}}</ref><ref>{{Cite web |last=Naidu |first=Yashodhan |date=September 5, 2025 |title=Hollow Knight: Silksong – Team Cherry Teases This New Feature in the Upcoming Game|url=https://in.ign.com/hollow-knight-silksong/240705/news/hollow-knight-silksong-team-cherry-teases-this-new-feature-in-the-upcoming-game |website=IGN |access-date=October 2, 2025}}</ref> as Team Cherry themselves stayed mostly silent during development, contrasting their prior more frequent updates for ”Hollow Knight”.<ref>{{cite web |last1=Randall |first1=Harvey |title=Why did Team Cherry’s devs stay so quiet about Hollow Knight: Silksong? ‘All we could really say is, we’re still working on it’, so they stopped doing that |url=https://www.pcgamer.com/games/action/why-did-team-cherrys-devs-stay-so-quiet-about-hollow-knight-silksong-all-we-could-really-say-is-were-still-working-on-it-so-they-stopped-doing-that/ |website=[[PC Gamer]] |date=21 August 2025 |access-date=October 2, 2025}}</ref><ref name=”berg”>{{cite news |last=Schreier |first=Jason |title=Why ‘Silksong’ Took Seven Years to Make |url=https://www.bloomberg.com/news/newsletters/2025-08-21/why-silksong-team-cherry-s-sequel-to-hollow-knight-took-so-long-to-make |work=[[Bloomberg News|Bloomberg]] |date=August 21, 2025 |access-date=21 August 2025 |url-access=subscription |archive-url=https://archive.today/20250821143053/https://www.bloomberg.com/news/newsletters/2025-08-21/why-silksong-team-cherry-s-sequel-to-hollow-knight-took-so-long-to-make |archive-date=21 August 2025}}</ref> In 2021, Canadian indie developer Mongoose Rodeo brought on Griffin to manage marketing and publishing for their upcoming Kickstarter-backed game ”[[Crowsworn]]” (TBA).<ref name=”jeuxvideo”>{{Cite web |author=meakaya |date=2022-07-31 |title=Crowsworn : entre Hollow Knight et Bloodborne, la prochaine pépite des jeux indés ?|url=https://www.jeuxvideo.com/news/1603144/crowsworn-entre-hollow-knight-et-bloodborne-la-prochaine-pepite-des-jeux-indes.htm |access-date=October 2, 2025|website=[[Jeuxvideo.com]] |language=fr}}</ref>
In June 2015, Chucklefish brought on Griffin as a publishing manager.<ref name=”fish”>{{Cite web |date=June 26, 2015 |title=Say hello to Matt! |url=https://chucklefish.org/blog/say-hello-to-matt/ |website=Chucklefish|access-date=2 October 2025 |last=Chucklefish}}</ref><ref name=”2024i”>{{cite web |title=Unfiltered Gaming Conversation with Matthew Griffin (Leth) |url=https://www.youtube.com/watch?v=SZ9GI8HlQZo |via=[[YouTube]] |last=Relyea |date=September 18, 2024 |access-date=October 3, 2025}}</ref> At Chucklefish, he helped publish and market the two games ”Interstellia” (2015)<ref name=”2024i” /><ref name=”tc” /> and ”[[Stardew Valley]]” (2016).<ref name=”2024i” /><ref name=”tc” /> Griffin later left Chucklefish,<ref name=”2024i” /> and in July 2016, Australian indie developer Team Cherry brought him on as their marketing and publishing manager for their then-upcoming [[Kickstarter]]-backed title, ”[[Hollow Knight]]” (2017).<ref name=”2024i” /><ref name=”tc”>{{Cite web |last=Team Cherry |date=July 5, 2016 |title=NEW ADDITION TO THE TEAM, AND RELEASE UPDATE |url=https://www.teamcherry.com.au/blog/new-addition-to-the-team-and-release-update |website=Team Cherry |access-date=2 October 2025}}</ref> He also led the localization of the game,<ref name=”2020i” /><ref name=”2023i” /> [[playtest]]ed it,<ref name=”2020i” /><ref name=”2023i” /> and [[voice act|voice acted]] some characters.<ref name=”2023i” /> He continued his partnership with Team Cherry for their next game, ”[[Hollow Knight: Silksong]]” (2025).<ref name=”delay”>{{cite web|url=https://www.gamespot.com/articles/hollow-knight-silksong-has-been-delayed/1100-6513963/|work=[[GameSpot]]|title=Hollow Knight: Silksong Has Been Delayed|last=Howard|first=Jessica|date=10 May 2023|accessdate=October 2, 2025|archive-date=20 September 2023|archive-url=https://web.archive.org/web/20230920045353/https://www.gamespot.com/articles/hollow-knight-silksong-has-been-delayed/1100-6513963/|url-status=live}}</ref> For ”Silksong”, Griffin managed marketing and publishing, helped playtest the game,<ref name=”2023i”>{{Cite web |title=Interviewing Leth from Team Cherry |url=https://www.youtube.com/watch?v=pDSVnMEV3K8 |last=BlueSR |via=[[YouTube]] |date=August 19, 2023 |access-date=October 2, 2025}}</ref> and voice acted.<ref name=”2023i” /> He also gave updates on the game’s development over the years,<ref name=”delay” /><ref>{{cite web |last=Cryer |first=Hirun |title=Five years after it was announced, Hollow Knight: Silksong devs assure rabid fans they are “still hard at work on the game” |url=https://www.gamesradar.com/five-years-after-it-was-announced-hollow-knight-silksong-devs-assure-rabid-fans-they-are-still-hard-at-work-on-the-game/ |website=[[GamesRadar+]] |date=14 February 2024 |access-date=October 2, 2025|url-status=live }}</ref><ref>{{Cite news |last=Nightingale |first=Ed |date=20 January 2025 |title=Hollow Knight: Silksong is ‘real, progressing and will release’, says Team Cherry |url=https://www.eurogamer.net/hollow-knight-silksong-is-real-progressing-and-will-release-says-team-cherry |access-date=October 2, 2025 |work=[[Eurogamer]] |archive-date=5 February 2025 |archive-url=https://web.archive.org/web/20250205112408/https://www.eurogamer.net/hollow-knight-silksong-is-real-progressing-and-will-release-says-team-cherry |url-status=live }}</ref> and revealed information,<ref>{{Cite web |last=Cryer |first=Hirun |date=June 16, 2020 |title=A New Hollow Knight: Silksong Character Was Revealed Through a Discord Riddle — “Huntress.” |url=https://www.vg247.com/a-new-hollow-knight-silksong-character-was-revealed-through-a-discord-riddle |website=VG247 |access-date=October 2, 2025}}</ref><ref name=”ShacknewsDenzer”>{{Cite web |last=Denzer |first=TJ |date=April 8, 2025 |title=Hollow Knight: Silksong is still coming to the original Switch |url=https://www.shacknews.com/article/143822/hollow-knight-silksong-switch-1 |website=[[Shacknews]] |access-date=2025-10-03}}</ref><ref>{{Cite web |last=Naidu |first=Yashodhan |date=September 5, 2025 |title=Hollow Knight: Silksong – Team Cherry Teases This New Feature in the Upcoming Game|url=https://in.ign.com/hollow-knight-silksong/240705/news/hollow-knight-silksong-team-cherry-teases-this-new-feature-in-the-upcoming-game |website=IGN |access-date=October 2, 2025}}</ref> as Team Cherry themselves stayed mostly silent during development, contrasting their prior more frequent updates for ”Hollow Knight”.<ref>{{cite web |last1=Randall |first1=Harvey |title=Why did Team Cherry’s devs stay so quiet about Hollow Knight: Silksong? ‘All we could really say is, we’re still working on it’, so they stopped doing that |url=https://www.pcgamer.com/games/action/why-did-team-cherrys-devs-stay-so-quiet-about-hollow-knight-silksong-all-we-could-really-say-is-were-still-working-on-it-so-they-stopped-doing-that/ |website=[[PC Gamer]] |date=21 August 2025 |access-date=October 2, 2025}}</ref><ref name=”berg”>{{cite news |last=Schreier |first=Jason |title=Why ‘Silksong’ Took Seven Years to Make |url=https://www.bloomberg.com/news/newsletters/2025-08-21/why-silksong-team-cherry-s-sequel-to-hollow-knight-took-so-long-to-make |work=[[Bloomberg News|Bloomberg]] |date=August 21, 2025 |access-date= 2025 |url-access=subscription |archive-url=https://archive.today/20250821143053/https://www.bloomberg.com/news/newsletters/2025-08-21/why-silksong-team-cherry-s-sequel-to-hollow-knight-took-so-long-to-make |archive-date=21 August 2025}}</ref> In 2021, Canadian indie developer Mongoose Rodeo brought on Griffin to manage marketing and publishing for their upcoming Kickstarter-backed game ”[[Crowsworn]]” (TBA).<ref name=”jeuxvideo”>{{Cite web |author=meakaya |date=2022-07-31 |title=Crowsworn : entre Hollow Knight et Bloodborne, la prochaine pépite des jeux indés ?|url=https://www.jeuxvideo.com/news/1603144/crowsworn-entre-hollow-knight-et-bloodborne-la-prochaine-pepite-des-jeux-indes.htm |access-date=October 2, 2025|website=[[Jeuxvideo.com]] |language=fr}}</ref>
