(Bloomberg) -- Video-game software company Unity Software Inc. signed its biggest contract yet to provide its digital simulation technology in support of the US government.

On Tuesday, Unity announced a three-year, multi-million dollar partnership with information technology firm CACI International Inc., which has provided aerial surveillance and other military intelligence to government branches. 

“Through this relationship, Unity will help the government defining human machine interfaces or HMI for aerospace applications and beyond,” said Marc Whitten, a senior vice president at Unity, on the company’s earnings call on Tuesday. “These applications demand an interactive, robust user experience very much like games.” 

Known for its eponymous game engine, which provides the software that runs dozens of top video games, Unity is betting its next wave of growth will come from marketing its real-time 3D platform to non-gaming industries as part of its “digital twin” strategy. Automotive manufacturers, factory designers and even real-estate developers can visualize and study digital incarnations of their creations using the Unity Game Engine. Recently, the company has helped clients visualize and study the movements of people, like with its simulation of the Hong Kong Airport.

The contract with CACI is Unity’s “single largest digital twin solutions deal for Unity to date,” the company wrote in its earnings report Tuesday. The deal helps set up Unity’s 3D platform for “future systems design and simulation programs across the US Government.” Unity has previously held contracts with the US Defense Department, which has reportedly caused concern among some employees. The military has used Unity’s software to visualize plane runways attacked by live munitions and train drones on identifying ordnance. 

CACI has held multi-million and billion-dollar contracts to support the US Army and Customs and Border Protection. Caci was awarded a $1.4 billion contract with the Defense Threat Reduction Agency to counter and deter weapons of mass destruction. 

CACI didn’t respond to a request for comment and Unity declined to comment. 

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