ArmA 3's Apex Protocol campaign has players take control of a four-man team of CTRG operators. The campaign is set on Tanoa, a small country that is a part of the Horizon Islands, a group of island nations in the South Pacific. It was added with the release of the Apex DLC.
Apex Protocol takes place in the aftermath of the events of "The East Wind".
The South Pacific island nation of Tanoa suffers a major disaster when a tsunami devastates the islands, displacing thousands in the process. As a local criminal organisation known as the Syndikat begins runs rampant and expands its control over vast regions of Tanoa. One of Syndikat's key leaders is a former member of the "Red Tiger" group named Solomon Maru, code named "Warlock", who attempted to topple a North African government through a coup almost a decade ago.
With the situation turning into a humanitarian disaster, NATO forces are soon sent in to assist with the crisis and take part in the "Safe Horizon" joint exercise with the local authorities. In reality, this exercise is being used as a cover for CTRG forces to conduct operations against Syndikat, who are attempting to discover the source of the Syndikat's disproportionally large quantity of CSAT military-grade equipment.
With the assistance of a HUMINT asset known as "Blue Cap", CTRG are able to disrupt Syndikat operations by destroying ammunition caches, and ambush and destroy a convoy en-route to attack a civilian village. Eventually, enough actionable intelligence is gathered to locate "Warlock". CTRG forces raid the location only to discover "Blue Cap" being tortured. CTRG eventually run into an ambush by what appears to be a Chinese CSAT special forces group known as Viper Team, but they manage to repel and escape the ambush.
Following the attack, both Raider teams eventually manage to locate and rescue their primary objective; callsign "Keystone", who turns out to be Captain Scott Miller. Previously thought to have been killed towards the end of the Altis Incident during the events of The East Wind, it is revealed that his main mission was to retrieve a seismic device being developed by CSAT scientists, codenamed as the "Eastwind" device. Miller's investigation discovered that Viper deployed and intentionally armed Eastwind on Tanoa in order to cause a tsunami to strike it as part of CSAT's so-called "Apex Protocol", a series of plans aimed at destabilising countries friendly to Western nations.CTRG and Miller attempt to extract via boat, but are ambushed as the arriving boat is destroyed and Viper elements assault their position. CTRG and Miller relocate for extraction via Ghost Hawk, but the helicopter is also hit by anti-air fire before landing and is forced to abort. CTRG and Miller then proceed to extract from the area by using Raider's original insertion boats that were used to deploy on the island.
Following his rescue, Raider elements proceed to assault a small black site used by Viper on Sosovu Island. As Raider 2 secures the site, it is revealed that Syndikat has double-crossed CSAT and intend to hold the Eastwind device ransom as blackmail against CSAT.
Both Raider 1 and 2 track the Eastwind device to the Blue Pearl Harbour where Syndikat are arming the device to cause yet another earthquake. With time running short and seismic activity increasing, both Raider elements quickly attack the port by first disabling the main power to the area, and then finding and assassinating "Warlock" and his senior lieutenant once and for all.
Raider 1 manages to secure the secondary code while Raider 2 obtains the primary codes, all the while fighting through the remaining Syndikat forces. Raider 2 then manages to locate the Eastwind device where they (along with Raider 1) are forced to hold off against waves of Viper who launch one desperate all-out assault in order to retrieve the device. They fail to stop the device from being disarmed however, and both Raider teams are eventually extracted with the Eastwind in tow, now finally "in safe hands".
Warm Welcome (11th August, 2035)
|«||Group 15 is deployed to ambush a Syndikat convoy en route to Tanoan village.||»|
With the intelligence provided by a local asset named "Blue Cap", CTRG's Raider teams ambush and destroy a Syndikat convoy that was en-route to raid a village before destroying ammo, fuel and multiple supply caches filled with military-grade CSAT weaponry.
Firestarter (12th August, 2035)
|«||Following Syndikat's unchecked aggression towards the citizens of Tanoa, Group 15 launch an operation to draw out their leadership.||»|
In a bid to draw out Warlock, Group 15 is sent to destroy a Syndikat weapons depot.
Heart of Darkness (13th August, 2035)
|«||Recently acquired intel sends Group 15 on a mission to kill or capture Warlock.||»|
Raider 1 and 2 are sent to obtain intel from "Blue Cap" but run into a surprise ambush by Viper Team.
Extraction (14th August, 2035)
|«||Deep in enemy territory and vastly outnumbered, Group 15 race to get Keystone to safety.||»|
24 hours after rescuing Captain Miller, CTRG teams Raider 1 and Raider 2 fall back for extraction.
Apex Protocol (16th August, 2035)
|«||Acting on intel uncovered by Captain Miller, Group 15 are sent to a former WW2 outpost in search of Viper.||»|
Raider elements attack a small black site on Sosovu Island being used by Viper Team as their base of operations.
End Game (18th August, 2035)
|«||Syndikat have occupied the Blue Pearl Industrial Port with the intent of ransoming the Eastwind Device. With enemies on all sides, Group 15 are deployed to end this once and for all.||»|
Raiders 1 and 2 find the Eastwind device at one of the island's main ports where Syndikat is arming it to use.
- Apex Protocol takes place exactly one day after the ending of The East Wind and at the same time during the events of Remnants of War.
- It is mentioned by Miller himself that he has been on Tanoa for at least four weeks prior to the start of the campaign investigating CSAT's activities in the region (where he was eventually captured by Syndikat).
- This seemingly contradicts the events of The East Wind, as even if Miller left the Republic of Altis and Stratis immediately following Nikos' rescue in Attention Deficit and the NATO counter invasion on Altis (Beyond Recognition), he would have at most been on Tanoa for only ten days; not including travel time.