Grant McCann Erickson clinched five silvers and ten bronze awards.
Judges at the Friday's Chillies press conference said the ad agencies need to improve the standard of their creations for better competition internationally as well as locally.
Among the winners, JWT won two silver and 7 bronze awards, Bates Asia one silver and two bronze, and LOWE LDB and Pheonix O & M two awards each.
TBWA and Ruby Studio won one award each.
Leo Burnett said in a statement it was the most awarded agency with 26 metals, including its second consecutive Gold in the TV category.
Leo Burnett won the only TV Gold awarded in 2006.