Given the increasing gas demand and declining domestic supply, countries in South-east Asia are bracing themselves to become net gas importers and are studying ways to enhance their security of supply. LNG will be the preferred source of gas, thanks to its flexibility and widespread availability at competitive prices in global markets. However, concerns related to excessive gas import dependency might reduce appetite for additional gas usage in South-east Asia. This could mean that coal would have a larger role, which is bad news for climate change. Countries in the ASEAN region need policies to achieve balanced, reliable, secure and cost-effective energy supply, a pre-requisite for the region’s ambitious economic development plans. A combination of solid local policies, investment by international players in the region and stability in global gas markets would enable gas to play a positive role in South-east Asia, which is a fast-growing region and an increasingly important catalyst of global energy market developments.