We finally know Project L's full name, and it's 2XKO
Briefly

Riot Games unveiled the game's new identity on social media, alongside new channels on X, and players can expect 2v2 tag-based gameplay with the ability to customize champion interactions through a Fuse system.
Players will have the opportunity to playtest 2XKO at various events throughout 2024, starting with Evo Japan, and can sign up for at-home playtesting on the official website.
Read at Polygon
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