On November 3, IG defeated Fnatic 3–0 in the 2018 League of Legends World Championship finals to become 2018 world champions.

nvictus Gaming added JackeyLove to their starting roster, when the young ADC prodigy finally became eligible for competitive play. Invictus Gaming started the Spring Split with a loss against future nemesis Royal Never Give Up, losing 1-2. After that match, Invictus Gaming went on a 18 series win streak, only dropping 3 games in the process and ending the regular season with an 18-1 record. IG were heavy favorites headed into the Spring Playoffs, however, starting top laner TheShy sustained an injury to his hand, forcing IG to use their sub top laner Duke instead, with whom they had little practice. Having secured a bye into the Semi Finals, IG faced Royal Never Give Up and lost 2-3. IG attended Rift Rivals, and faced SK Telecom T1 and Machi 17 during the group stage, defeating both. In the finals, they faced KT Rolster, to whom they lost. In the Summer Split, IG managed to achieve the same record as they had in Spring, once again going 18-1 in series, but dropping more games along the way, and once again losing their only series to Royal Never Give Up. Headed into the Summer Playoffs, IG had yet again secured a semifinal bye. They faced JD Gaming in the Semifinal, managing to defeat them, 3-2. For the first time ever, IG found themselves in the LPL Final, and a spot at the 2018 World Championship as at least the second seed. They faced Royal Never Give Up once again. RNG won the first two games after the final, pushing IG to game point. IG managed to win both Game 3 and 4, and were poised to win Game 5. However, RNG made a comeback in Game 5, and once again denied IG the LPL championship. IG were put into Group D at the World Championship, along with Fnatic, 100 Thieves, and G-Rex. IG ended the group stage with a 5-1 record, but ended up losing the tiebreaker for 1st to Fnatic, so IG headed into the quarterfinals as the second seed from Group D. They were drawn against Korean champions KT Rolster, whom they had previously lost to at Rift Rivals in Dalian. IG were the underdogs going into the series, but managed to take KT down in 5 games after nearly sweeping them but for an extremely close base race in Game 3. In the semifinals in Gwangju, IG faced G2 Esports, who had managed to take down IG's nemesis RNG in 5 games. Despite analysts calling for a possible close series, IG defeated G2 3-0 as Rookie and TheShy starred against lane opponents Perkz and Wunder. In the grand final in Incheon, IG faced Fnatic again and this time dominated, winning 3-0 in the third-fastest best-of-5 series in professional League of Legends history. It marked not only IG's and China's first World Championship but also IG's first international tournament win and the first non-Korean world champion since Taipei Assassins in 2012. Ning won Finals MVP honors after posting a 13/3/29 KDA in the series (including 11/0/19 as Camille in Game 1 and Gragas in Game 2).