The player takes on the role of assorted characters throughout a single-player campaign. The characters' involvement within the plot happens at the same time and overlaps the events within the game. As such, the player's perspective changes from one character to a different between missions. every mission options a series of objectives; the player is light-emitting diode to every objective with the heads up show, that marks its direction and distance. Some objectives need that the player arrives at a stop, whereas different objectives need the player to eliminate enemies during a specified location, stand their ground to defend associate degree objective, or plant explosive charges on associate degree enemy installation. once the credits, a special epilogue mission is unfastened for play, that includes a four-man squad retrieving a panjandrum from terrorists United Nations agency have hijacked associate degree plane. The SAS rescue the panjandrum and escape before the plane is destroyed.
A player completes the target of a Domination multiplayer game by capturing and defensive three flags.
Call of Duty four options team-based and deathmatch-based multiplayer modes on varied maps. every mode has associate degree objective that needs distinctive methods to complete. Players will decision in UAV intelligence activity scans, air strikes, and attack helicopters, once they win three-, five-, and seven-enemy kill streaks severally. A game ends once either a team or player has reached a predefined variety of points, or the assigned time expires during which case the team or player with the foremost points wins. If the points square measure even once the time expires, overtime mode is activated during which there's no re-spawning and therefore the team United Nations agency either has the last man standing, or achieves the target 1st square measure the winners. If the player is in either of the 2 matches, then there's associate degree Overtime match, during which successive team to win is rewarded the conclusion.
The player's performance within the multiplayer mode is half-track with expertise points, which may be attained by killing opposing players, finishing challenges, finishing objectives, or by finishing a spherical or match. because the player gains expertise, they advance in level, unlocking new weapons, perks, challenges, and gameplay modes. the very best gettable level is fifty five, however on the console versions of the sport, the player has the choice to enter "Prestige" mode, that returns their level to at least one and removes all accumulated unlockables. This method may be continual up to ten times with a unique badge being given whenever.
Completing a challenge grants expertise points and will unlock weapon attachments. As a player's level will increase by gaining expertise points among on-line games, it unlocks new weapons, perks, or challenges. because the player advances in levels, they earn the flexibility to customise their classes; this includes choosing their main weapon, firearm and special bomb sort. to boot, the player will choose three perks, one from every of the 3 "Tiers", which will customise their character more. Perk effects embrace, however don't seem to be restricted to, further ammunition, increasing bullet injury by the player, or dropping a live bomb once the player is killed. The player is additionally given the selection to complete challenges so as to receive even additional expertise points; challenges embrace achieving an explicit variety of kills with a selected weapon, shooting down a chopper or performing arts variety of head shots. to boot, once the player attains an explicit quantity of headshots with a selected weapon, excluding sidearms, the player unlocks further weapon "camos", or camouflage, to use for that specific weapon.
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