|
| genre = First-person shooter | modes = Single-player, multiplayer | platforms = Windows, OS X, Linux }} ''Half-Life: Opposing Force'' is an expansion pack for Valve Software's science fiction first-person shooter video game ''Half-Life''. The game was developed by Gearbox Software and Valve Corporation and published by Sierra Entertainment on November 19, 1999. ''Opposing Force'' is the first expansion for ''Half-Life'' and was first announced in April 1999. Randy Pitchford, the lead designer on the game, later noted that he believed Gearbox was selected to develop ''Opposing Force'' because Valve wanted to concentrate on their future projects. Over the course of development, Gearbox brought in a variety of outside talent from other areas of the video games industry to help bolster various aspects of design. ''Opposing Force'' returns to the same setting as ''Half-Life'', but instead portrays the events from the perspective of a U.S. Marine, one of the enemy characters in the original game. The player character, Adrian Shephard, is sent in to neutralize the Black Mesa Research Facility when a scientific mishap causes it to be invaded by aliens, but quickly finds that the Marines are outnumbered and slowly being beaten back by a second alien race and black operations units. ''Opposing Force'' was received well by critics, many describing it as the new benchmark title for expansion packs, in a similar fashion to how ''Half-Life'' revolutionized the first-person shooter genre. Other reviewers, however, thought that the game still had many of the negative aspects of other expansion packs, although it was still regarded as an exceptional add-on. ==Gameplay== As an expansion pack for ''Half-Life'', ''Opposing Force'' is a first-person shooter. The overall gameplay of ''Opposing Force'' does not significantly differ from that of ''Half-Life'': players are required to navigate through the game's levels, fight hostile non-player characters and solve a variety of puzzles to advance. The game continues ''Half-Life''s methods of an unbroken narrative. The player sees everything through the first person perspective of the protagonist and remains in control of the player character for almost all of the game. Story events are conveyed through the use of scripted sequences rather than cut scenes. Progress through the game's world is continuous; although the game is divided up into chapters, the only significant pauses are when the game needs to load the next part of an environment. ''Opposing Force'' also features an extended multiplayer, incorporating the various new environments and weapons into the original deathmatch mode used in ''Half-Life''.〔 〕 After release, a new capture the flag mode with additional levels, items and powerups, was created by Gearbox for the game.〔 For the most part the player battles through the single-player game alone, but is occasionally assisted by friendly non-player characters. Security guards and scientists will occasionally help the player in reaching new areas and convey relevant plot information. However, ''Opposing Force'' also features fellow U.S. Marines who will assist the player in combat to a far greater degree than security guards. Three types of Marines are featured in the game: the soldier will simply provide fire support for the player with a submachine gun, shotgun or machine gun, the combat medic is capable of healing the player and other non-player characters, while the engineer can cut through doors and remove obstacles, allowing the player and their squad to proceed unhindered. A selection of enemies from ''Half-Life'' populate the game, including alien creatures such as headcrabs and Vortigaunts. A variety of new alien non-player characters, labelled "Race X", appear in the game as well, often engaging in combat with the aliens from Xen. The player also encounters human opponents in the form of a detachment of black operations units who have been sent to destroy the base in the wake of the failure of the U.S. Marines to eliminate the alien threat. A limited selection of ''Half-Life''s weaponry is allocated to the player to defend themselves with, although several new weapons such as a sniper rifle, combat knife and a variety of alien weaponry are also present in the game. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Half-Life: Opposing Force」の詳細全文を読む スポンサード リンク
|