Red Faction: Guerrilla

Purchase the satellite locator upgrade with recovered salvage at any safehouse. Get a vehicle, and start driving around. When you get within range of a radio tag, a small pulsing green dot will appear on your map. Follow the map. The green dot indicates the location of a missing tag. Some of the tags are in difficult to reach locations. Using a dune-buggy type vehicle is recommended.

Unlock the EOS sector. At the EOS loading screen you should see a view with what appears to be unfinished smoke stacks. Go to that location. It is located on the map where there are two collateral damages and the demolition master. It may take some time to spawn. It will spawns next to the collateral damage closest to the demolition master. They come in red, blue, and yellow.

Enter HARDHITTER as a code.

The list appears as follows. Note: All Challenges can be completed in Matchmaking, Custom Matches, or a combination of both modes. Use the "Statistics" view to see where you are for all of these not the "Leaderboards".

1 Life: 10 Kills - 1 Weapon
1 Life: 25 Bonus XP
1 Life: 5 XP - 5 Backpacks
1 Life: 50 XP
1 Life: Kill - 5 Weapons
1 Life: 15 Bonuses (different types not fifteen of the same one)
10 Kills - Every Weapon
10 Wins - Every Game Type
100 Wins
100 XP - Every Backpack
100 XP - Every Weapon
1000 Kills - 1 Weapon
5000 XP - 1 Backpack
5000 XP - 1 Weapon
500 XP - 1 Bonus XP Event
5 XP - Every Bonus XP Event

Successfully complete the campaign.

Southeast of the Badlands safehouse near a large group of ore is what appears to be a Mars Exploration Rover. It is marked as a vehicle on the map, but cannot be controlled or destroyed.

Complete the indicated task to unlock the corresponding reward and amount of experience points.

Assist (150): Damage an enemy, a teammate then kills.
Heal Teammate (325): Restore at least half of a teammate's health.
Pack Hunter (550): Be near a teammate when they kill an enemy.
Rescue Kill (700): Kill an enemy near a teammate that has been knocked down.
Synchronized Kill (900): Kill an enemy at the same time a nearby teammate does.
Vendetta (1,200): Kill an enemy who recently killed a teammate.
Crush (1,500): Kill an enemy with building debris.
Beat Down (1,600): Kill an enemy with a melee attack.
Streak Stopper (1,800): Kill an enemy who is unstoppable.
Death from Above (2,150): Kill an enemy by thrusting down.
Remote Save (2,300): Kill an enemy before they can detonate a remote charge stuck to you or a teammate.
Survivor (2,600): Recover to full health after nearly dying.
Unstopable (3,050): Kill 5 or more enemies in a row.
Backwhat? (3,200): Kill an enemy that is wearing a backpack while you are not wearing one.
Knockdown (3,650): Knock down multiple enemies simultaneously with the concussion pack.
Death By Boundary (4,100): Knock an enemy out of the level boundaries.
Stuck (4,400): Detonate a remote charge stuck to an enemy.
Headshot Kill (4,500): Kill an enemy with a headshot.
Who's #1 (5,000): Kill the enemy with the highest number of kills.
Full Control (5,400): Fully repair a target.
Mega Kill (5,800): Kill multiple enemies within 3 seconds.
Back Off (6,600): Kill an enemy who is melee attacking at close range.
Ghost Kill (7,000): Kill a stealthed Enemy.
Bullseye (7,200): Kill an enemy with a direct rocket hit.
Backfire (7,800): Kill an enemy with their own explosive.
You're doing it wrong! (8,250): Kill an enemy with the Reconstructor.
Charge (8,750): Rhino charge through a wall and kill an enemy.
Power Trip (9,500): With Firepower active, kill an enemy with a melee weapon.
Interceptor (10,600): Kill a ragdolling enemy in mid-air.
Hail Mary (10,900): Kill an enemy from far away without using a gun.
Blast (11,500): Kill an enemy with an explosive barrel or tank.
Flagman (12,200): Kill an enemy with their team flag.
Air Strike (13,000): Kill an enemy while in the air.
Shake it Up (14,200): Kill an enemy while your Tremor pack is activated.
Dust Bunny (15,500): Kill an enemy who is in mid-jump.
Good Timing (16,500): Use the Rhino or Thrust pack to survive an attack.
BBQ (17,500): Hit 3 enemies simultaneously with the Arc Welder.
Blindside (18,750): Kill an enemy from behind.
Payback (20,250): Exact revenge within 15 seconds of respawning.
X-Ray (22,500): Kill an enemy through a wall with the Rail Driver.
Sharpshooter (24,000): Shoot and kill an enemy from far away.
Sleeper Kill (27,000): Kill a fallen enemy with a melee attack.
Death from Below (29,000): Kill an enemy by thrusting up.
Rainbow Wars (31,000): Kill an enemy that is using the Heal Pack.
Lined Up (33,000): Hit 2 or more enemies with one Rail Driver shot.
Doppleganger (38,000): Kill an enemy that has the same backpack you do.
Zombie Kill (44,000): Kill an enemy from beyond the grave.
Vertigo (48,000): Kill an enemy above or below you.
Camper (52,000): Kill an enemy while standing still.
No Problem (56,000): Kill an enemy while at full health.

The area "Parker" of Mars is named after the protagonist in the original Red Faction.

The area "Eos" of Mars is named after the Faction's leader in the original Red Faction.

When you are around people, they will start talking and say things about Ultor, which is the company from Saints Row 2. They will also say "Damn drones confiscated my feed dogs collection", which is the band from Saints Row.

The area "Mt. Vogel" of Mars is a reference to Dean Vogel, whom you had to kill in the last mission of Saints Row 2. You also only get to enter it at the last mission before the campaign is complete.

If you kill your brother, Dan, at the very beginning of the first mission, you will die instantly, but the death message reads "WTF? You killed your brother?"