This disclosure relates to a system and method for generating power from a high-pressure gas stream. The system includes a combustion engine, such as a gas turbine, which generates power and exhaust gas. A heat exchanger utilizes this exhaust gas to heat the high-pressure gas stream. The heated gas is then expanded through an expander, like an expansion turbine, to a lower pressure, generating additional power. The system may incorporate a fuel conditioning system and can drive an electric generator. It also features a second combustion engine and expander for further efficiency. The method involves generating power, heating the gas stream, and expanding it to a lower pressure, with options for injecting a hydrate inhibitor and removing water vapor. This approach enhances the efficiency of gas turbines by utilizing exhaust heat and expanding gas streams to maximize power output.