Pada 2017, Riot Games mengajukan gugatan terhadap pengembang dari game seluler berjudul [[Mobile Legends: Bang Bang]], yaitu Moonton Technology Co. karena adanya pelanggaran hak cipta dengan alasan kesamaan antara Mobile Legends dan League of Legends. Kasus tersebut awalnya dihentikan di [[California]] karena forum non-konvensi. Kemudian, Tencent atas nama Riot Games mengajukan gugatan baru ke pengadilan Tiongkok, yang memenangkan Tencent pada Juli 2018 dan memberikan ganti rugi sebesar 2,9 juta dolar AS.<ref>Mickunas,{{cite Aaronweb (July 18, 2018). [|url=https://dotesports.com/league-of-legends/news/source-riot-games-parent-tencent-wins-lawsuit-mobile-legends-31079 "|title=Riot Games parent Tencent wins $2.9 million in lawsuit against Moonton CEO"].Dot|first=Aaron Esports.|last=Mickunas Archived|date=July from18, the2018 original|website=[[Dot onEsports]] July|access-date=November 1124, 2019 |archive-url=https://web.archive.org/web/20190711104720/https://dotesports.com/league-of-legends/news/source-riot-games-parent-tencent-wins-lawsuit-mobile-legends-31079 Retrieved|archive-date=July November 2411, 2019. |url-status=live }}</ref><ref>Lanier,{{cite Lizweb (July 19, 2018). [|url=https://variety.com/2018/gaming/news/riot-games-tencent-wins-lawsuit-league-of-legends-copy-1202878322/ "|title=Tencent Wins Lawsuit Over 'League of Legends' Copycat"].Variety.|first=Liz Archived|last=Lanier from|date=July the19, original2018 on|website=[[Variety March(magazine)|Variety]] 30|access-date=November 24, 2019 |archive-url=https://web.archive.org/web/20190330075502/https://variety.com/2018/gaming/news/riot-games-tencent-wins-lawsuit-league-of-legends-copy-1202878322/ Retrieved|archive-date=March November 2430, 2019. |url-status=live }}</ref>
Pada Oktober 2019, Riot Games mengajukan gugatan terhadap Riot Squad Esports LLC, sebuah organisasi esports asal Chicago yang didirikan pada Maret 2019. Riot Games menuduh Riot Squad dengan sengaja melanggar merek dagang "Riot" milik Riot Games.<ref>Carpenter,{{cite Nicoleweb (October 10, 2019). [|url=https://www.polygon.com/2019/10/10/20908027/riot-games-copyright-trademark-lawsuit-riot-squad "|title=Riot Games files lawsuit against esports organization over 'Riot' trademark"].Polygon.|first=Nicole Archived from the original on|last=Carpenter |date=October 10, 2019.Retrieved|website=[[Polygon (website)|Polygon]] |access-date=November 24, 2019 |archive-url=https://web.archive.org/web/20191010191617/https://www.polygon.com/2019/10/10/20908027/riot-games-copyright-trademark-lawsuit-riot-squad |archive-date=October 10, 2019 |url-status=live }}</ref><ref>Chalk,{{cite Andyweb (October 11, 2019). [|url=https://www.pcgamer.com/riot-games-sues-esports-organzation-riot-squad-over-trademark-infringement/ "|title=Riot Games sues esports organization{{sic|organz|ation|nolink=y}} Riot Squad over trademark infringement"].PC|first=Andy Gamer.|last=Chalk Archived|date=October from11, the2019 original|website=[[PC onGamer]] October|access-date=November 1824, 2019 |archive-url=https://web.archive.org/web/20191018222204/https://www.pcgamer.com/riot-games-sues-esports-organzation-riot-squad-over-trademark-infringement/ Retrieved|archive-date=October November 2418, 2019. |url-status=live }}</ref>
