Secret Mission - Saint's Row 2
There is one secret mission in Saints Row 2 that can be triggered at any time. Completing it yields the “Vengeance” achievement on the Xbox 360 version, and it also counts towards the 100% completion rating.
The starting point for this mission is in the Stilwater Police Station in the southwest quarter of the Saint’s Row District.
Put away your weapon and enter the station. Make your way to the third floor via the staircases in the room behind the circulation desk. Enter the room that is marked “Authorized Personnel Only.” The officers in here won’t shoot you, so head inside. You’ll be able to see three Saints markers. Stand in each of these markers and listen to the wiretap conversations.
Afterwards, enter the office in the northeast corner of the room to spot another Saints marker. Stand in the marker and press Y/Triangle to pick up Julius’ file and add Dex’s number to the mobile phone.
Select “Phone” in the pause menu, open up the Phonebook, and call Dex from there. He tells you to meet him at the old hideout, which is in front of Ultor Corporation tower.
After the cutscene, unit after unit of Masako squad members will enter the church. You must eliminate the squad members of one unit to face the next. The first three units consist of four or five squad members. They are all carrying assault rifles, so take cover behind a pew if your health is low.
When you’ve survived three or so waves, slightly larger Masako units will appear outside. The first unit hits the west side of the church, the second the east, and the last to the south. Don’t bother firing at the Ultor APC; just wait for the squad to step out.
Right after protecting the church from three more units, you are then faced with an Ultor attack helicopter. The helicopter can endure a great deal of damage, but it doesn’t seem to attack at all. Just stand in the doorway and fire at the helicopter until it crashes. With the helicopter down, sprint to Julius’ car.
You’re in charge of defending the car from pursuers. The AR-50 XMAC you’ve been given has infinite ammo, but there really doesn’t seem to be a whole lot of need for a defender. Only Ultor APCs will really trail after you, and they don’t seem to ever attack. Nevertheless, just pelt the APCs with grenades until Julius crashes the car.
At this point, you’ll be surrounded by a mess of Masako squad members. There are two attack helicopters flying overhead, and you’ll have to shoot them both down to complete this mission. You should be relatively safe from the squad members if you head down to bottom of the amphitheatre, since they don’t tend to venture down into this area.
The helicopters here take just as long to destroy as the one you faced at the church. You still have that AR-50 XMAC with unlimited ammo, so completing this objective is more tedious than anything.
Shoot down both helicopters to complete the mission. Your reward is $30,000 and Julius’ car added to your crib garage.