Добавлено (02.06.2017, 14:19)
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Сделал вот так 
target_run_time = 30 * 60;
missionBonusTime = 30 * 60;

waitUntil {sleep 5; a3a_var_started};
missionEndTime = diag_tickTime + target_run_time;
target_run_time = target_run_time + diag_tickTime;

[] spawn
{
waitUntil
{sleep 10;(diag_tickTime > (missionEndTime + (missionnamespace getVariable ["a3a_var_pausedtime", 0])))};
if (alive vip1) then {["Время на атаку вышло", EAST] call a3a_fnc_endMission;};
};

[] spawn
{
waitUntil
{sleep 10;(diag_tickTime > (missionEndTime + (missionnamespace getVariable ["a3a_var_pausedtime", 0]) + missionBonusTime))};
["Время на атаку вышло", EAST] call a3a_fnc_endMission;
};

Добавлено (02.06.2017, 14:36)
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Сделал еще проще 
waitUntil { sleep 1; a3a_var_started };
target_run_time = 1 * 60; 
_alert_time = diag_tickTime + target_run_time;
waitUntil {sleep 10;(diag_tickTime > (_alert_time + (missionnamespace getVariable ["a3a_var_pausedtime", 0])))};
if (alive vip1) then {["Время на атаку вышло", EAST] call a3a_fnc_endMission;};