The trailer for Call of Duty: Black Ops was released to the public on April 30, 2010.http://www.nowpublic.com/culture/new-call-duty-black-ops-trailer-release-date-2612185.html Developed by Treyarch; the first full-length trailer for Call of Duty: Black Ops was aired during the NBA Eastern Conference Finals, on May 18, 2010. The uncut version of the Call of Duty: Black Ops trailer showed some new features that developers prepared for this episode. The trailer shows game play concentrating on black ops soldiers. The action takes place in a variety of locations. During the trailer, players can also observe that there is a wide collection of weapons that can be used.http://www.youtube.com/watch?v=OPTOVQFRggI

In addition to the new weapons, the trailer also reveals that players have the chance to use different vehicles, including helicopters. These vehicles will serve a double purpose as they can also be used for attacks or extractions.http://www.youtube.com/watch?v=OtRnpC7ddv8 Since Call of Duty: Black Ops centers on a particular class of soldiers, players have the chance to follow a story-line that unfolds the entire history of these characters. Although the game focuses on the "Career Mode", the "Multi-player Mode" will also be available to players and the PC version of Call of Duty: Black Ops will feature dedicated servers to sustain this mode. http://www.metacafe.com/watch/4638625/call_of_duty_black_ops_trailer/

Call of Duty: Black Ops, the next game from Call of Duty series was announced officially on April 30, 2010. The game will be published by Activision and will be released on November 9, 2010 for PC, PlayStation 3, Xbox 360 and Nintendo Wii.http://www.gamestop.com/Catalog/ProductDetails.aspx?product_id=77794

‘’Call of Duty: Black Ops’’ takes place during the Cold War. Even though there are sequences in Vietnam, it is not about the Vietnam war. Regions that players are sent to are for a mission in the game play. The Black Ops missions are “deniable operations” that take place during this time period.http://www.guardian.co.uk/technology/gamesblog/2010/sep/20/call-of-duty-black-ops-interview

One of the weapons used in the game is the crossbow. Treyarch's studio head Mark Lamia explains why this weapons was included in the game. He says, it ...is a great example of how elite black ops teams were permitted to equip themselves for whatever job they had at hand, which means that they could get a hold of anything and modify it any way they wanted to accomplish their missions objectives. The specific crossbow in the game is based off the design of a military grade crossbow. The use of the our crossbow was inspired by a story we heard about from Major Plaster about a member of SOG who would equip himself with a bow for some of his real-life missions, and our research, which showed its use by indigenous warriors in Vietnam that fought with special forces. In our case here, it served this mission as a dual-purpose weapon used for stealth, and one which when modified, could stealthily and precisely place a lethal explosive at range.http://content.usatoday.com/communities/gamehunters/post/2010/05/more-on-call-of-duty-black-ops-with-treyarch-studio-head-mark-lamia/1