The 24-year-old was unveiled by his new club on transfer deadline day and joins after snubbing a big-money move to Chelsea.
Questions were raised of Oxlade-Chamberlain's motives when reports first emerged of his desire to leave Arsenal, but it's now been revealed exactly what happened.
According to the Independent, the Ox rejected a new contract worth £180,000-per-week for the chance to play in his preferred position at the club he supported as a child.
Oxlade-Chamberlain wants to play more centrally, whereas Arsene Wenger and Chelsea manager Antonio Conte see him as a right wing-back.
So desperate was the England international to leave Arsenal, in fact, that he accepted a contract from Liverpool worth £60,000 less than what he would have earned in north London.
In a world where footballers are accused of chasing money, it's refreshing to see a player motivated more by playing time than high wages.
Liverpool have now confirmed the move on Twitter after images were leaked of Oxlade-Chamberlain in their kit.
It remains to be seen whether Arsenal or Liverpool have made a mistake with Oxlade-Chamberlain, but many Arsenal fans think they've got the better end of the deal.
Thirty-five million pounds for an injury-prone 24-year-old with under 12 months remaining on his contract? That's pretty good business.
One thing Arsenal fans won't miss about Oxlade-Chamberlain is his inconsistency and now a pretty hilarious video is going viral of some mistakes he made at the club.
Sarcastically titled, "I will miss Chambo so much," the video shows Oxlade-Chamberlain messing up skills and goalscoring opportunities, namely against Tottenham. Check it out.
OXLADE-CHAMBERLAIN'S ARSENAL 'HIGHLIGHTS'
Brilliant. Arsenal fans are clearly salty about losing Oxlade-Chamberlain, who has now spoken after his move to Liverpool was confirmed.
"I'm delighted to have signed for Liverpool and a big thank you to everyone that has made this possible, using the facilities," he said. "It has been a massive help.
"I'm not going to say too much today; I'm here with England and we've got two big games coming up, so I want to focus on them. But I can't wait to get to Melwood and you'll hear first from me on LFCTV."