Would The Philippines make sense as a civ? Don't know much about Filipino history, what was there before Spain colonized?
Let me quote a paragraph from Wikipedia summarizing Filipino history after founding cities but before Spanish arrival:
"Eventually various groups developed, separated into hunter-gatherer tribes, warrior societies, petty plutocracies and maritime-oriented harbor principalities which eventually grew into kingdoms, rajahnates, kedatuans, huangdoms and sultanates. These small nations were either greatly influenced by the Indian Hindu religion, language, culture, literature and philosophy from India through many campaigns from India including South-East Asia campaign of Rajendra Chola I, Islam from Arabia or were Sinified tributary states allied to China. The nations included the Indianized Rajahnates of Butuan and Cebu, the dynasty of Tondo, the august kingdoms of Maysapan and Maynila, the Kedatuan of Madja-as, the sinified Huangdom of Ma-i, the Huangdom of Pangasinan as well as the Muslim Sultanates of Sulu, Lanao and Maguindanao. These small maritime states flourished from the 1st millennium. These kingdoms traded with what are now called China, India, Japan, Thailand, Vietnam, and Indonesia. The remainder of the settlements were independent barangays allied with one of the larger states."
^This era lasted from 10th to early 16th century so - yes, Philippines have cool history

Although I'd put them in after few more 'basic' major civs are in (Mongolia, Persia, Ottomans, Andean civ...)