A cross-platform game runtime engine and associated tools coded in C++. Gamebryo is originally from Numerical Design Limited (NDL), and is the successor to NDL's NetImmerse engine. Since the creation of Gamebryo, NDL merged with Emergent Game Technologies. The new company is known as "Emergent Game Technologies" (EGT). Gamebryo, now called Gamebryo Element, is the product of the new Emergent Game Technologies.