The Acer Arena (also known by its current sponsored name, Allphones Arena) is a large entertainment and sporting complex located in Sydney, Australia. It is situated in Sydney Olympic Park, and was completed in 1999 as part of the facilities for the 2000 Summer Olympics. The AU$190‑million facility was designed and constructed by Abigroup Ltd and Obayashi Corporation with environmental factors in mind; however, the air-conditioner unit for the facility used HCFCs and was said to be a breach of the Green Guidelines for the Olympics.