The transition towards decarbonization by 2050 necessitates a significant shift from fossil fuels to a mix of renewables, energy efficiency, electrification, hydrogen adoption, and CO2 capture. This transformation requires efficient energy storage and transport systems to support renewable deployment. A key technology in this transition is the use of ammonia-based power generation, which can be synthesized from green or blue hydrogen and serve as a sustainable energy vector. Ammonia can be directly used as fuel or decomposed to hydrogen for storage in integrated systems, powering fuel cells for clean electricity production. However, challenges exist in the efficiency of direct ammonia solid oxide fuel cells, the endothermic nature of ammonia decomposition, and the high temperatures required for ammonia cracking. Research is ongoing to optimize integrated systems for energy efficiency, considering factors such as fuel cell type, scale, and cracking/separation technologies. Recent trends show a growing interest in integrated systems utilizing ammonia as a fuel, with a focus on overall system efficiency and the interaction among system components. This review aims to provide a comprehensive evaluation of integrated system configurations for ammonia-based power generation, addressing energy efficiency and system integration outcomes.