Logan Paul is finally revealing how he broke his hand last year ... admitting it happened while drunkenly attempting to get the high score on an arcade boxing game.
TMZ Sports posted pics of Logan with a busted hand back in September ... but for the longest time, no one knew the 5 Ws and 1 H about the injury.
As it turns out, the Maverick was out on the town in Germany ... and when he came across an arcade punching bag at a bar, he grew determined to stroke his own "I'm a real boxer" ego and get the top score.