„History of Unreal - Part 1”. beyondunreal.com. 31. 5. 2005. Архивирано из оригинала 7. 7. 2011. г. Приступљено 5. 7. 2009. „'Probably the biggest draw to Unreal was the ability to mod it. Tim Sweeney (Founder of Epic) wrote a simple scripting engine into the game called UnrealScript.'”CS1 одржавање: Формат датума (веза)
„History of Unreal - Part 1”. beyondunreal.com. 31. 5. 2005. Архивирано из оригинала 7. 7. 2011. г. Приступљено 5. 7. 2009. „'Probably the biggest draw to Unreal was the ability to mod it. Tim Sweeney (Founder of Epic) wrote a simple scripting engine into the game called UnrealScript.'”CS1 одржавање: Формат датума (веза)