In June 2011 he signed a two-year contract with APOEL. On 20 July 2011, he scored his first official goal for APOEL, in a UEFA Champions League 2nd qualifying round match against Skënderbeu Korçë, by scoring APOEL's third goal in a 4–0 home win. He also appeared in four 2011–12 UEFA Champions League matches for APOEL, in the club's surprising run to the quarter-finals of the competition. On 9 August 2012, he scored the only goal in APOEL's 0–1 victory against Aalesunds FK at Color Line Stadion, for the return leg of the UEFA Europa League 2nd qualifying round. On 3 September 2012, Adorno scored a hat-trick in APOEL's 0–5 win at Tasos Markou Stadium against Enosis Neon Paralimni for the first matchday of the 2012–13 Cypriot First Division. Two months later, on 5 November 2012, Adorno scored his second hat-trick of the season in APOEL's 4–1 league win at GSP Stadium against Ayia Napa. At the end of the season, he became a champion for the first time in his career after winning the 2012–13 Cypriot First Division with APOEL. The next season, his third as an APOEL player, he won all the titles in Cyprus, the Cypriot League, the Cypriot Cup and the Cypriot Super Cup. On 1 September 2014, his contract with APOEL was mutually terminated.