distribution day of defeat
Albums of recorded music were developed in the early 20th century , first as books of individual 78rpm records , then from 1948 as vinyl LP records played at rpm . Vinyl LPs are still issued , though in the 21st century album sales have mostly focused on ___MASK58___ ( CD ) and MP3 formats . The audio cassette was a format used from the late 1970s through to the 1990s alongside vinyl . A ___MASK79___ is a collection of related web pages , including multimedia content , typically identified with a common domain name , and published on at least one web server . A ___MASK79___ may be accessible via a public Internet Protocol ( IP ) network , such as the Internet , or a private local area network ( LAN ), by referencing a uniform resource locator ( URL ) that identifies the site . Day of Defeat is a team - based multiplayer first - person shooter video game set in the European theatre of World War II on the Western front . Originally a modification of the 1998 game Half - Life , the rights of the modification were purchased by Valve Corporation and released as a full retail title in 2003 . The game was generally well - received , with an aggregate score of 79 / 100 on Metacritic . Set in the midst of World War II , Day of Defeat includes no single - player campaign , with focus left only on the game ' s multiplayer aspects . The game favors teamwork and features objective - based gameplay in combination with its system of classes . Maps are primarily made up of narrow paths , all of which typically lead to a few key locations . An official remake of the game , Day of Defeat : Source , was released by Valve in 2005 . Utilizing the then - new Source engine , the remake featured various improvements over its predecessor , including updates to gameplay , graphics , and audio functionality . Valve Corporation ( commonly referred to as Valve ) is an American video game developer and ___MASK20___ company headquartered in Bellevue , Washington . The company is known for the " Half - Life ", " Counter - Strike ", " Portal ", " Day of Defeat ", " Team Fortress ", and " Left 4 Dead " series , " Dota 2 ", and its software distribution platform ___MASK15___ . ___MASK60___ ( an abbreviation of " digital versatile disc " or " digital video disc ") is a digital ___MASK70___ storage format invented and developed by Philips , Sony , Toshiba , and Panasonic in 1995 . The medium can store any kind of digital data and is widely used for software and other computer files as well as video programs watched using ___MASK60___ players . DVDs offer higher storage capacity than compact discs while having the same dimensions . Left 4 Dead is a cooperative first - person shooter video game with survival horror elements , developed by Valve South and published by Valve Corporation . The game uses Valve ' s proprietary Source engine , and is available for Microsoft Windows , Xbox 360 and OS X . Development on the game was completed on November 13 , 2008 , and two versions were released digitally : A downloadable ___MASK13___ version , released on November 17 , 2008 , and a ___MASK13___ retail disc version , with a release date determined by region . The ___MASK13___ retail disc version was released in North America and Australia on November 18 , 2008 ; and in Europe on November 21 , 2008 . ___MASK20___ ( also called content delivery , online distribution , or electronic software distribution ( ESD ), among others ) is the delivery or distribution of media content such as audio , video , software and video games . The term is generally used to describe distribution over an online delivery medium , such as the Internet , thus bypassing physical distribution methods , such as paper , compact discs , and VHS videocassettes . The term online distribution is typically applied to freestanding products ; downloadable add - ons for other products are more commonly known as downloadable content . With the advancement of network bandwidth capabilities , online distribution became prominent in the 21st century . Metacritic is a ___MASK79___ that aggregates reviews of media products : music albums , games , movies , TV shows , DVDs , and formerly , books . For each product , the scores from each review are averaged . Metacritic was created by Jason Dietz , Marc Doyle , and Julie Doyle Roberts . The site provides an excerpt from each review and hyperlinks to its source . A color of Green , Yellow or Red summarizes the critics ' recommendations and therefore the general appeal of the product to reviewers and , to a lesser extent , the public . It is regarded as the video game industry ' s foremost review aggregator .