Given the question: Information: - Nvidia Corporation (most commonly referred to as Nvidia, stylized as NVIDIA, nVIDIA or nvidia) is an American technology company based in Santa Clara, California. Nvidia designs graphics processing units (GPUs) for the gaming market, as well as system on a chip units (SOCs) for the mobile computing and automotive market. Nvidia's primary GPU product line, labeled "GeForce", is in direct competition with Advanced Micro Devices' (AMD) "Radeon" products. Nvidia expanded its presence in the gaming industry with its handheld SHIELD Portable, SHIELD Tablet, and SHIELD Android TV. - Tripwire Interactive is an American game development studio and publisher based in Roswell, Georgia, formed by members of the international team that created the acclaimed "Unreal Tournament 2004" mod, "". "Red Orchestra" won top prize in the nVidia-sponsored Make Something Unreal competition. Their first retail product, "", was released over Valve Corporation's Steam service on March 14, 2006. They are also a licensee of Epic's Unreal Engine 3. - Red Orchestra 2 : Heroes of Stalingrad is a World War II - themed tactical first - person shooter video game developed and published by Tripwire Interactive . It is a sequel to Red Orchestra : Ostfront 41 - 45 . The title focuses heavily on the Battle of Stalingrad . The game was released on 13 September 2011 . The developers have stated that the game is a Windows exclusive and have no plans to bring it to consoles . The game contains many new features , including a new first - person cover system combined with blind firing , first person collision detection , as well as an entirely new system of statistics tracking and player development . - A video game is an electronic game that involves human or animal interaction with a user interface to generate visual feedback on a video device such as a TV screen or computer monitor. The word "video" in "video game" traditionally referred to a raster display device, but as of the 2000s, it implies any type of display device that can produce two- or three-dimensional images. Some theorists categorize video games as an art form, but this designation is controversial. - The user interface (UI), in the industrial design field of humancomputer interaction, is the space where interactions between humans and machines occur. The goal of this interaction is to allow effective operation and control of the machine from the human end, whilst the machine simultaneously feeds back information that aids the operators' decision-making process. Examples of this broad concept of user interfaces include the interactive aspects of computer operating systems, hand tools, heavy machinery operator controls, and process controls. The design considerations applicable when creating user interfaces are related to or involve such disciplines as ergonomics and psychology. - World WarII (often abbreviated to WWII or WW2), also known as the Second World War, was a global war that lasted from 1939 to 1945, although related conflicts began earlier. It involved the vast majority of the world's nationsincluding all of the great powerseventually forming two opposing military alliances: the Allies and the Axis. It was the most widespread war in history, and directly involved more than 100 million people from over 30 countries. In a state of "total war", the major participants threw their entire economic, industrial, and scientific capabilities behind the war effort, erasing the distinction between civilian and military resources. Marked by mass deaths of civilians, including the Holocaust (in which approximately 11 million people were killed) and the strategic bombing of industrial and population centres (in which approximately one million were killed, and which included the atomic bombings of Hiroshima and Nagasaki), it resulted in an estimated 50 million to 85 million fatalities. These made World WarII the deadliest conflict in human history. - Hiroshima is perhaps best known as the first city in history to be targeted by a nuclear weapon when the United States Army Air Forces (USAAF) dropped an atomic bomb on the city (and later on Nagasaki) at 8:15a.m. on August 6, 1945, near the end of World War II. - A computer monitor or a computer display is an electronic visual display for computers. A monitor usually comprises the display device, circuitry, casing, and power supply. The display device in modern monitors is typically a thin film transistor liquid crystal display (TFT-LCD) or a flat panel LED display, while older monitors used a cathode ray tubes (CRT). It can be connected to the computer via VGA, DVI, HDMI, DisplayPort, Thunderbolt, LVDS (Low-voltage differential signaling) or other proprietary connectors and signals. Given the information above, choose from the list below the object entity that exhibits the relation 'software engine' with the subject 'red orchestra 2: heroes of stalingrad'. Choices: - computer - nvidia - united states army - unreal engine
The answer is:
unreal engine