Infinite XP in Vault 11
After reaching the sacrificial chamber and dispatching the robots go to the computer terminal through the previously closed wall and enter it. The bottom option can be pressed over and over again to gain 500 XP each time. If any of the other options are chosen or the terminal is exited you cannot use the exploit again.
Once Primm has a new sheriff, The Vikki and Vance Casino will become open. If you save before every hand in blackjack, you can just load the game if you lose. If you go to the cash register, you can trade in your chips for caps. The NPC will give you the equivalent in caps, but will not take away your chips. You can do this infinitely.
If you purchase or find the Anti-Material Rifle and then equip .50MG, Incendiary rounds. Equip both rifle and ammo and just target some one in VATS and then close VATS. They should catch on fire and lose some health. You can also select more then one person in VATS before closing it to burn more people using the right joystick. You will not aggro enemies or friendlies. Also you will not lose karma or Reputation with each kill. Very useful if you need to kill a NCR/Legion with something you need on them.
Infinite Experience Glitch
If your speech skill at 50 or higher, you can persuade Old Ben to offer his escort services to the local bar, if you succeed in the Speech Challenge, you'll gain 61 XP. If you follow him back to the bar afterwards and wait until he sits down, you can speak to him again and redo the same Speech Challenge over and over again for infinite XP! You can find Old Ben sitting by a fire close to The King's headquarters in Freeside.
You need Speech of 30 or the perk Confirmed Bachelor. You must also be on the good side of NCR. Go to HELIOS One and the lady should automatically talk to you. Once she allows you access HELIOS One, you should be able to start the mission "That Lucky Old Sun". Follow the mission and talk to Fantastic and Ignacio Rivas. While talking to Rivas make sure you get him to reveal that he's a Follower of the Apocalypse by using Speech or Confirmed Bachelor and agree with his ideals about peace or just say you're neutral. Do the mission regularly until you get to the point where you activate the Mainframe Terminal. Configure the Power Grid to "5) Full Region (Emergency Output Level). Finish the mission by hitting the Reflector Control Panel outside on top of the tower. Go back to Ignacio Rivas and choose the option "I overloaded the plant. No one.....". The glitch is that the option never disappears, so you can choose to keep pressing it. You get 350XP, 3 Stimpacks, and 2 Doctor's Bag
.357 Magnum Revolver - Lucky In Primm, in the floor safe inside the cashier's area of the Vikki and Vance Casino.
.44 Magnum Revolver - Mysterious Magnum Owned by the Lonesome Drifter, by the Sunset Sasparilla Billboard, close to El Dorado Dry Lake.
9 Iron - Nephi's Golf Driver Carried by a Fiend named Driver Nephi, in his territory.
9mm Pistol - Maria On Benny, when you kill him.
9mm Submachine Gun - Vance's Submachine Gun In Win's Hideout, inside the safe.
Alien Blaster At the Hovering Anomaly.
BB Gun - Abilene Kid LE BB Gun Inside the Fiend's Shack, lying on a shelf.
Bladed Gauntlet - Cram Opener In Camp McCarran, owned by Little Buster.
Boxing Gloves - Golden Gloves Inside Lucky 38 Casino, on the upper bar of the casino floor.
Bumper Sword - Blade Of The East In Legate's Camp, carried by Legate Lanius.
Cleaver - Chopper On the stove of Wolfhorn Ranch.
Combat Knife - Chances Knife In Chance's Grave.
Cowboy Repeater - La Longue Carabine In Camp McCarran, carried by Corporal Sterling.
Displacer Glove - Pushy Inside the Ruby Hill Mine, on the body of a Jackal Gang member.
DogTag Fist - Recompense Of The Fallen In Aurelius' desk, on the upper floor of the main building in Cottonwood Cove.
Euclid's C-Finder On the Freeside Streets, carried by Max, in and around Nick and Ralph's.
Fat Man In Quarry Junction, near the skeleton by the southern silt pool. It is also occasionally found on prospector corpses.
Fire Axe - Knock Knock In the Camp Searchlight Fire Station, in the restrooms.
Frag Grenade - Holy Frag Grenade In Camp Searchlight, in the basement of the eastern church. Wild Wasteland must be taken.
Gauss Rifle - YCS/186 At the Mercenary Camp; Wild Wasteland trait must not be taken.
Grenade Machine-gun - Mercy On the floor of Dead Wind Cavern, near a dead BoS Paladin.
Grenade Rifle - Thump-Thump At the Nellis Array, lying on the floor near the Ant mound.
Hunting Shotgun - Dinner Bell At the Old Nuclear Test Site, inside the shack.
Laser Pistol - Pew Pew After completing "The Legend Of The Star" quest, it will be on the body of Allen Marks.
Laser Rifle - AER14 Prototype Inside the Vault 22 Common Area, on the blocked stairwell only accessible from the Food Production level.
Lead Pipe - The Humble Cudgel Inside the Sealed Sewers, near the Prospector Corpse.
Machete - Liberator In Nelson, carried by Dead Sea.
Minigun - CZ57 Avenger In the Devil's Throat, inside, at the back of the container trailer, by the dead body.
Missile Launcher - Annabelle In Black Rock Mountain, carried by the Nightkin Sniper on Black Rock Summit.
Marksman Carbine - All-American In the Armory Cache, Vault 34, on the floor, on an upturned table.
Oh, Baby! In the deepest part of Charleston Cave, near a Chewed Stealth Boy.
Plasma Rifle - Q-35 Matter Modulator In the locked shipping room of REPCONN HQ, in a pod casement.
Pulse Gun In the Armory Cache, Vault 34.
Sawed-Off Shotgun - Big Boomer In Gibson Scrap Yard, carried by Old Lady Gibson.
Sniper Rifle - Gobi Campaign Scout Rifle In the footlocker of the Sniper's Nest, overlooking the Cottonwood Cove.
Spiked Knuckles - Love and Hate In Bonnie Springs, on the Viper Gang Leader.
Straight Razor - Figaro In the back of King's School of Impersonation, owned by Sergio.
Tesla Cannon - Tesla-Beaton Prototype On the ground near the crashed Vertibird.
That Gun In Novac, on a shelf in the locked storage room inside the Dino Bite Gift Shop.
This Machine At the end of the "Dealing With Contreras" quest, it will be a reward from Contreras for not turning him in.
Varmint Rifle - Ratslayer Inside the Broc Flower Cave, propped up against the desk.
Zap Glove - Paladin Toaster In Black Rock Cave, near the body of the dead prospector.
|Ain't That a Kick in the Head (Bronze)
||Completed Ain't That a Kick in the Head.
|All or Nothing (Bronze)
||Completed All or Nothing.
|Arizona Killer (Bronze)
||Completed Arizona Killer.
|Artful Pocketer (Bronze)
||Pick 50 pockets.
|Blast Mastery (Bronze)
||Cause 10,000 damage with Energy Weapons.
|Caravan Master (Silver)
||Win 30 games of Caravan.
|Come Fly With Me (Bronze)
||Completed Come Fly With Me.
||Craft 20 items.
|Desert Survivalist (Bronze)
||Heal 10,000 points of damage with food.
|Double Down (Bronze)
||Play 10 hands of Blackjack.
|For the Republic (Silver)
||Completed For the Republic.
|G.I. Blues (Bronze)
||Completed G.I. Blues.
|Globe Trotter (Silver)
||Discover all snow globes.
|Hack the Mojave (Bronze)
||Hack 25 terminals.
||Play the game from start to finish in Hardcore Mode.
|Jury Rigger (Bronze)
||Repair 30 items.
|Know When to Fold Them (Bronze)
||Win 3 games of Caravan.
|Lead Dealer (Bronze)
||Cause 10,000 damage with Guns.
|Little Wheel (Bronze)
||Play 10 spins of Roulette.
|Love the Bomb (Bronze)
||Cause 10,000 damage with Explosives.
|Master of the Mojave (Silver)
||Discover 125 locations.
|Mod Machine (Bronze)
||Install 20 weapon mods.
|New Kid (Bronze)
||Reach 10th level.
|New Vegas Samurai (Bronze)
||Cause 10,000 damage with Melee Weapons.
|No Gods, No Masters (Bronze)
||Completed No Gods, No Masters.
|No Tumbler Fumbler (Bronze)
||Pick 25 locks.
|Ol' Buddy Ol' Pal (Bronze)
||Recruit any companion.
|Old-Tyme Brawler (Bronze)
||Cause 10,000 damage with Unarmed weapons.
|One Armed Bandit (Bronze)
||Play 10 spins of Slots.
|Outstanding Orator (Bronze)
||Make 50 Speech challenges.
|Platinum Trophy (Platinum)
||Collect all other 50 Trophies for this Trophy.
|Render Unto Caeser (Silver)
||Completed Render Unto Caeser.
|Return to Sender (Bronze)
||Completed Return to Sender.
|Stim-ply Amazing (Bronze)
||Heal 10,000 points of damage with Stimpaks.
|Talent Pool (Bronze)
||Completed Talent Pool.
|That Lucky Old Sun (Bronze)
||Completed That Lucky Old Sun.
|The Boss (Silver)
||Reach 30th level.
|The Courier Who Broke the Bank (Silver)
||Get banned from all the Strip's casinos.
|The House Always Wins (Silver)
||Completed The House Always Wins.
|The Legend of the Star (Bronze)
||Completed The Legend of the Star.
|The Whole Gang's here (Silver)
||Recruit all companions.
|They Went That-a Way (Silver)
||Completed They Went That-a Way.
|Up and Comer (Silver)
||Reach 20th level.
|Veni, Vidi, Vici (Bronze)
||Completed Veni, Vidi, Vici.
|Walker of the Mojave (Bronze)
||Discover 50 locations.
|Wild Card (Silver)
||Completed Wild Card.
|You Run Barter Town (Bronze)
||Sell 10,000 caps worth of goods.
|You'll Know It When It Happens (Bronze)
||Completed You'll Know It When It Happen