Question: What company developed the game engine that Brother in Arms uses as its technology base?
Context: Game engine recreation is a denomination for game engines that are clones of the original game engine binary that came with the video games.  The main motivation behind such a project is the wish to play the game on other operating systems than those supported by the original game engine. Diesel is a game engine developed and used by Grin.  The engine was originally developed for their game "Ballistics" and has been used, albeit with modifications, in a number of other games since then.  The first installment of the engine was developed in close collaboration with Nvidia, aimed to showcase the capabilities of their latest graphics chip at the time, the GeForce 3.  The engine is currently in use by Overkill Software, former owners of the now defunct developer Grin.  Overkill's game, "Payday: The Heist", uses a modified version of this engine. " Payday 2" and upcoming "" are using the second generation Diesel engine 2.0. Brothers in Arms: D-Day is a first-person shooter video game in the "Brothers in Arms" series for the PlayStation Portable.  It uses the Unreal Engine 2.0 as its technology base.  Though labeled as a spin-off, the game's plot is actually a crossover/compilation of "" and "" from the main series. The Rockstar Advanced Game Engine (RAGE) is a proprietary game engine developed by the RAGE Technology Group at Rockstar San Diego, with contributions by other Rockstar Games subsidiaries.  The engine has been used on several different platforms such as Microsoft Windows, PlayStation 3, PlayStation 4, Wii, Xbox 360 and Xbox One.  The Angel Game Engine was originally developed by Angel Studios for "Midtown Madness" and later the sixth generation console era versions of the "Midnight Club" series and other Angel Studios games. Game engine recreations are remade engine interpreters for video games that replace the original engine binary that came with the original game.  A notable example of game engine recreation is ScummVM which successfully recreated the SCUMM engine of classical LucasArts' point and click adventures. For further examples, refer to the list of game engine recreations. Biopure Corporation was a biopharmaceutical company that specialized in oxygen therapeutics (blood substitutes) for both human and veterinary use.  The company developed, manufactured, and marketed oxygen therapeutics, designed to transport oxygen to the body's tissues.  The oxygen technology uses hemoglobin-based oxygen carrying molecules in solution (HBOCs) to increase oxygen transfer to the tissues.  The competing companies with Biopure were Allied Pharmaceutical, Northfield Laboratories, Baxter International and Hemosol of Toronto.  The company developed two products: Hemopure (HBOC-1) <nowiki>[hemoglogin glutamer-250 (bovine)]</nowiki> for human use, and Oxyglobin (HBOC-301) <nowiki>[hemoglobin glutamer-200 (bovine)]</nowiki> for veterinary use.  As of April 2001, Hemopure was approved for commercial sale in South Africa for treatment of acute anemia in general surgery.  However, Hemopure has not been able to gain approval in the U.K. or the U.S. because of safety and reliability concerns of the European Commission and the U.S. Food and Drug Administration (FDA) respectively.  The company formed an agreement with the U.S. Navy to aid in preclinical testing of Hemopure for out-of-hospital treatment of trauma patients in hemorrhagic shock.  Oxyglobin is the only oxygen therapeutic approved for treatment of canine anemia in both Europe and the U.S. and has treated thousands of cases.  Unable to obtain FDA approval for Hemopure to date, Biopure ceased operations in 2009 and its assets were purchased by OPK Biotech LLC in September 2009.  On July 16, 2009 Biopure announced it had filed for bankruptcy protection under Chapter 11, Title 11, United States Code and entered into an agreement with OPK Biotech LLC for the sale of substantially all of its assets . A game engine is a software framework designed for the creation and development of video games. Developers use them to create games for consoles, mobile devices and personal computers.  The core functionality typically provided by a game engine includes a rendering engine ("renderer") for 2D or 3D graphics, a physics engine or collision detection (and collision response), sound, scripting, animation, artificial intelligence, networking, streaming, memory management, threading, localization support, scene graph, and may include video support for cinematics.  The process of game development is often economized, in large part, by reusing/adapting the same game engine to create different games, or to make it easier to port games to multiple platforms. The Unreal Engine is a game engine developed by Epic Games, first showcased in the 1998 first-person shooter game "Unreal".  Although primarily developed for first-person shooters, it has been successfully used in a variety of other genres, including stealth, MMORPGs, and other RPGs. With its code written in C++, the Unreal Engine features a high degree of portability and is a tool used by many game developers today.  It has won several awards, including the Guinness World Records award for "most successful video game engine." The Fidelity Ultimate Chess Challenge is a 2-D, 3-D, Chess game by Telegames.  You can either play one player vs the game engine or two players (using the same console).  The game engine uses the experience of the Fidelity company which elaborates the Master rated (2325 Elo) chess program.  It certainly uses the program of the 6502 programs (Sensory 9—Excellence) series. Zero is a proprietary game engine created by Pandemic Studios.  It was used first in the game "" and later used in several "Star Wars" games including the popular "Battlefront" series.  "Battlezone II: Combat Commander" and "Dark Reign 2" both feature an in-engine editor accessible via commands.  The engine was revamped for "" to accommodate consoles and third person gameplay.  The engine was again retooled for "" and the level editor was made a separate entity from the game engine.  A set of modding tools including ZeroEdit, the new level creation tool, were released for use with "Star Wars: Battlefront" on December 23, 2004.  An updated version of the tools were released on February 2, 2006 for "".  Pandemic used Zero as their primary engine for several of their games developed in their Los Angeles, California studio.  A modified version of the Zero engine was also used in Pandemic's "Mercenaries 2: World in Flames".
Answer: Epic Games