Spirit-X

Hint: Text for Axe Easter Eggs
On the Fremont Street level there is a bottle of Axe on a ledge. Shoot the bottle and the roof on Fremont Street changes to an animation of a girl in a bikini with some Axe materials in neon. A movie opens up showing some outtakes and pretty funny Rainbow situations/early animations.

Hint - Unlock New Gear:
After destroying the opposition in campaign (single or multi-player) don't forget to pick-up each new weapon you come across. While you don't have to keep a weapon and finish a map to unlock it in your customization menu, you do need to hold onto it briefly or your profile will not save it.

Another advantage is once you "claim" the weapon, you can die or restart the mission entirely and use it in the stage you got it from. This way, all the enemies you drop pretty much restock that weapon's ammo and you literally will be carrying a portable ammo dump throughout that stage.

Note: Hil-IGN says you can find the riot shield somewhere in Act 2 of the single player game, but SNG-IGN playing on co-op noticed it did not appear.

Hint - Survival XP Exploit:
One player should create a 2 player Survival Match with a 5 Minute interval and 1 private slot. Invite your friend and start the match. Wait until there are only 1 to 2 seconds left in the match and then have one of the players kill the other. The winner will receive 395 - 398 XP and the loser will receive 196 to 199 XP depending on how long was left in the round. Alternate a few times to unlock some early extras.

XBL Ranks:
Enlisted Ranks
Private 2nd Class ... Start
Private 1st Class ... 3000
Specialist ... 8400
Corporal ... ... 14500
Sergeant ... ... 23500
Staff Sergeant ... 38500
Sergeant 1st Class ... 56500
Master Sergeant ... 82500
First Sergeant ... 109500
Sergeant Major ... 139000

Officer Ranks:
2nd Lieutenant ... 172000
1st Lieutenant ... 214000
Captain ... 264000
Major ... 330000
Lt. Colonel ... 415000
Colonel ... 535000
Elite ... 675000

Team Sharpshooter match with even teams:
10 min win=600 points
15 min win=900 points
20 min win=1200 points

You also get points when you lose, but this is somewhere between 200 and 400.

Easter Egg - Axe Spray Goofiness:
On Fremont Street (single-player) locate the Kapone casino entrance. While facing the entrance, look to the player's left and there will be a black AXE Men's Body Spray bottle sitting on a planter. Shooting it once will let you see test footage for R6 Vegas.

Hint - Unlock New Gear:
After destroying the opposition in single player campaign, don't forget to pick-up each new weapon you come across. While you don't have to keep a weapon and finish a map to unlock it in your customization menu, you do need to hold onto it briefly or your profile will not save it.

Another advantage is once you "claim" the weapon, you can die or restart the mission entirely and use it in the stage you got it from. This way, all the enemies you drop pretty much restock that weapon's ammo and you literally will be carrying a portable ammo dump throughout that stage.

Note: you need to reload your gamertag's last checkpoint each time you boot the game to get your gear back. If you choose to load a stage without loading your last checkpoint, your previously earned weapons will be lost.

Hint - Survival XP Exploit:
One player should create a 2 player Survival Match with a 5 Minute interval and 1 private slot. Invite your friend and start the match. Wait until there are only 1 to 2 seconds left in the match and then have one of the players kill the other. The winner will receive 395 - 398 XP and the loser will receive 196 to 199 XP depending on how long was left in the round. Alternate a few times to unlock some early extras.