Modern Combat 4: Zero Hour

The basic gameplay in Zero Hour is similar to the three previous games in the series, and also similar to the Call of Duty games. However, Zero Hour is more derivative of Call of Duty: Black Ops II and Call of Duty: Black Ops than the Modern Warfare series (Call of Duty 4: Modern Warfare, Call of Duty: Modern Warfare 2 and Call of Duty: Modern Warfare 3), upon which the previous games in the series were based. Unlike the previous games, the players also control the antagonist Edward Page for some selected levels, as well as assume the role of a drone operator in a level. The players also control Sergeant Anderson in one level.

The game is controlled using virtual buttons on-screen; a virtual control stick is used for movement, while aiming is achieved by swiping on the touchscreen. Gyroscopic controls are also featured. The player can also crouch, throw grenades, use their weapon's iron sights, reload, change weapon, pick up different weapons, knife enemies, mantle obstacles, and shoot using buttons and prompts on the touchscreen. All controls can be customized from the main menu. The single-player campaign also includes Quick time events.

The game begins as Lieutenant Walker (one of the protagonists from Modern Combat 3: Fallen Nation) gives a speech to his squad mates on board a troopship, warning them that the upcoming struggle is going to be extremely difficult. The ships reach a beach in Hawaii, and the player takes control of Corporal Joel Blake as he fights his way to a stronghold to rescue a group of politicians who were attending a peace summit, which was named as the C3 (Centralized Currency Consortium) Conference. Amongst the hostages is the US President, they meet Lieutenant Downs (a major NPC in Black Pegasus and Fallen Nation) and storm the stronghold, the team discovers that the security hired for the summit, a private military company called Saunders Global Security, are in fact the ones responsible for the attack and the hostage situation.

The game then switches to the perspective of Edward Page (a supporting antagonist in Fallen Nation) two days prior to the invasion of Hawaii. A former Green Beret, he is now turned against the US and has vowed to destroy the country and undermine its political ideologies. Accompanied by another former Green Beret, and CEO of Saunders Global Security, Everett Saunders, Page infiltrates the War Crimes Investigations building in Seattle, and destroys it. Meanwhile, Sergeant Anderson (one of the protagonists in Black Pegasus and a major NPC in Fallen Nation), now part of the AFTER (Americas First Tactical Emergency Response) Operatives fights his way through the devastated streets of Seattle towards the WCI building only to discover that the destruction of the building was a distraction, so that Page could kidnap the US President in Hawaii.

Although the iOS version received "favorable" reviews according to the review aggregation website Metacritic, such reviews tended to feel that the Modern Combat series had become somewhat stagnant.

IGN's Justin Davis said, "Much like the Call of Duty franchise that it apes, Modern Combat 4 can sometimes feel more like soulless and disconnected series of set-piece battles instead of a cohesive FPS experience. The 13-mission, 4-hour campaign feels designed by check-box. Unmanned drone mission? Check.