Well, first off, congratulations. You've done better than about 99% of the world's population. You seriously deserve a pat on the back.
Go ahead. We won't judge you.
Just don't get carried away, because you've still got work to do. Between zombies trying to dine on your remaining extremities and scoundrels fighting you for your cash and supplies, survival is a constant struggle. Luckily for you, Hollinwood Cemetery is here to help you out.
Here's the most important thing anyone can tell you about how to play the game: KEEP YOUR DUEL SKILL LEVEL UP TO YOUR PLAYER LEVEL!
(New players: you're going to be tempted to level up quickly in the beginning, especially when there are special missions and weapons to be gained. Fight this feeling! Many of us have learned the hard way that once you get into a certain level range (mid 20s and beyond), and this skill is lacking, you are going to get dueled... a lot. And you will lose... a LOT! You can duel players 5 levels above AND below you, and if your skills are weak, you will be getting a lot of (losing) duel notifications. Having a target on your back is never fun, so avoid this by keeping your Duel skill maxed.)
The fastest way to get your Duel skill level up is by dueling players that show up as 'Tough' on your Duel List, because if you win you get 2 duel points instead of 1 (which you still get if you lose). First, empty your cash and supplies into your safe house or gold/food bars, because odds are you are going to lose these fights. Pick players who have duel scores that are relatively close to yours (within a few hundred points, ideally), and have at it! Keep a list of players who are in your range to make this process easier.
Also, be sure to purchase and upgrade ALL available weapons from the Black Market. Yes, even the kitchen knife. YES, EVEN THE HEDGE TRIMMER! These items influence your duel score, which is based mostly on your duel level, but your weapons and safe house (if you're in one) also play a part. Maximizing this score will help you to win more duels, and not present yourself as an easy mark to other duelers. Upgrade regular weapons first, then do 'special event' weapons, as these have a smaller impact on your duel score.
As your duel score gets higher, you may find it hard to find 'toughs' in your list. One way to get around this is not waiting for heals in between duels- as your health goes down, so will your duel score, and players that were just 'Even' before will become 'Toughs', so you will have more options.
The other reason Dueling is so important is because it's one of the best ways to get cash and supplies in the game. You can win up to 10% of your Player Level, 5% of what you are carrying or 5% of what someone else is carrying in every duel, whichever is less. So, for example, a Level 20 player can win up to 200 cash/supplies, but has to carry at least 4000 cash/supplies in order to win the maximum amount. (200/5%).
Even though Dueling is the most important skill now, at some point Safehouse Wars will become part of the game, and skills like Scavenge, Healing, and possibly Hunting* will come into play. Take this time to get all your skills where they need to be.
(*Right now it's impossible to get Hunting up to your player level, but an upcoming update to the game will allow players to raise this skill WITHOUT gaining XP.)
The maximum number of outposts you can have is 3x your trader level. The more outposts you have, the more cash/supplies you get, BUT the more outposts you have over your trader level, the more you are penalized for it... such is life! It is definitely worth it to have more outposts than your skill level 'allows'. Personally I've found 2.5x to be a good number, but to each their own. In the beginning, you should care more about increasing your trader skill quickly over getting more supplies, so it's recommended to have mostly 3 HR outposts. As your player level goes up, invest in some 24/48 HR outposts to gain cash and supplies. In general you should have mostly supply outposts, as cash is pretty easy to come by by other means (dueling, hunts), and you use it FAR less than you use supplies.
Save those health packs for hunts- if you're hurt, you want another player to heal you. And in order to heal or be healed, you're gonna need some friends! You can do this by posting your Friend Code (FC) into General Chat (GC), or by adding other people when they post their FC in GC. Some people don't like to give out their friend code, others want to have as many friends as possible. The upside to having a lot of friends is that you probably will never run out of people to heal or heal you. The downside is that you cannot duel people on your friends list, so your fighting options may be limited. It all depends on you and how you want to play the game.
Remember all those weapons you bought and upgraded? Here's where you get to use them. I shouldn't have to tell you how to kill zombies- isn't that how you made it this far in the first place? A couple of tips though: for harder zombies (Hulkers, Special Ops, Bloodnose... *shiver*), consider hiring another player. Pick a player who is 5 lvls above you with fully upgraded weapons if possible. You can also create a Foursquare account and log in through that, which will provide you with a 'meat shield' (yes, we're very sentimental in the post apocalyptic world) that can take a hit for you. Make sure you're carrying health packs- THIS is the time when you want to use them. Also, you can get a 15% damage bonus if you tap the area where your weapons show up BEFORE they show up. Doing this with tougher zombies is NOT recommended... we're all still trying to figure out what a 15% bonus on a 'kick' or 'punch' is. A nasty bruise? I don't think that zombie you're fighting really worries about his appearance anymore. And I think his missing arm would hurt more than your sucker punch.
Outside of this, every time you use a weapon or get hit, your weapons or armor gets damaged. Make sure you keep them in shape by repairing them often.
There isn't much to say about scavenging outside of this: don't get caught. Also, keep a few lock picks on you, because you can find cash, duel items, and more supplies in a locked room than you usually find in a regular scavenge.
Ah, yes. Safehouses. One of the best features of the game. You can chose a SH based on where they are in the SH rankings, their members' personality in GC, what level they are... it's completely up to you. Being in a safehouse gives you player bonuses depending on the SH level, and the biggest bonus (if you like the social aspect of PSC) is SH chat because unlike GC, no tokens are needed. Find people you click with and go from there! You can also try to create your own SH, but be prepared, it's hard work. There's a LOT of promoting to be done, and many people have started their own only to leave for an established house. BUT if you're willing to put in the work, you can really make something great. One thing that really helps in this regard is to have a SH with a great name (but don't go creating a fake place on Foursquare- it's liable to be moved to a real location or deleted, which wastes your investment). And it wouldn't be right to end this section without mentioning that Hollinwood Cemetery is currently the #9 SH in PSC with 37 awesome members. Just throwing that out there. The more you know!
You need credits to gain certain items in this game (certain weapons in the black market, energy drinks, stamina pills, additional slots for health packs, extra gold/food bars, and to buy more GC chat tokens). Most of the players in PSC don't pay for credits, or have only spent a minimal amount of cash in the game. There are several ways to get free credits in the Black Market:
1. Daily Log-in bonus. Even if you don't have time to play the game, make sure to open the app once a day. You can get up to 5 credits and $800 cash/supplies per day (after 65 days).
2. Videos/App Downloads (under Earn Free Credits button in Black Market). Watch a video; get a credit. Download an app; get 5. You can only do a certain amount of these a day, but it's a good way to gain credits.
3. Offers (under Earn Free Credits button in Black Market). Some of these are free, others you have to pay for. If you're interested in any of the stuff they're shilling- err, selling- go for it.
4. Tapjoy. Sign up for it. Great way to get extra credits.
Also, now that credits are becoming a larger part of the game, don't waste your credits buying weapons that can be bought for cash.
If this isn't curing your craving for more cowbell credits, then go ahead and buy them. You may want to wait for a sale though- they're becoming pretty regular!
This information should get you going in Zombieland. Above all, remember: this is just a game, so have fun!