If you are going to do this achievment, the easiest and quickest way to do so is through Blackjack. Here I will cover the basics of the game, as well as some tips specifically for Fallout: New Vegas (they are specific because it relies on explotation of game mechanics, doesn’t work in real life). So, lets begin! In the game of Blackjack, the goal is to get as close to 21 as possible without going over. The player that is closest to 21 wins the pot. Each card with a number is worth it’s said number. Ex, a 7=7 points. Each face card is worth 10 points, ex kings, queens, and jacks. An Ace is worth 1 or 11 points, depending on how you want to play it. So, an Ace coupled with a face card or a 10 is an instant win, unless the dealer also has a 21, in which case you break even, losing no money and gaining no money. Below I will cover a all the technical things you will deal with.
Gives you one card. Not recomended if you have an 18 or higher
Gives you fallout new vegas blackjack one card and doubles your bet. After you do this, you cannot hit, with the exeption being in splits. If you have very high luck, I recommend doing this if you have 10 to 12 points, as you normally get a good card. If you have 10 points, there is no possiblility of you going over and if your luck is high you will normally get a eight, nine, or ten.
You can only do this when you have two cards of the same value, two of the same face cards, or two aces. What splitting does is splits the cards into two hands, which you can seperatly deal with. When you double down on on hand, you can still hit on the other. Be warned when splitting, as when you split your doubles, and when you double down on one hnd, it doubles your original bet. Ex, if your original bet was 200, and you split, your new bet is 400. If you double down on one hand, you will increase your bet to 600. This is one of the easiest ways to loose money, so be wise when doing this.
Ends your turn.
Every once in a while, you will be dealt an instant Blackjack. When this happens, you will receive one half of your original bet in addition to your bet. Ex, if you bet 200 and got an instant Blackjack you would then recieve 300.