In designing completions for deep, high-temperature applications, operators have historically concentrated their efforts on two sections, either the upper or lower completion. By focusing solely on the two sections, operators have been unable to maximize the compatibility of the entire well completion. An organized, well-planned, incremental approach to the two components of the well completion leads to safer, more efficient installations and long-term operability. This paper will discuss the challenges associated with deep gas completions and how a systematic approach to overall completion design can save time and money while establishing a safe installation process. In addition, it will cover the emerging technologies in the completions field for the deep gas marketplace and how they can improve completion design effectiveness.