Guaranteed Mystery Bonus at Two NJ Casinos


No, you’re not seeing double. If knowing that your next NJ online casino bonus offer is guaranteed has you giving a big sigh of relief, but you also love the excitement of a mystery bonus, this is your lucky weekend. Two Caesars owned NJ gambling websites, Harrah’s Online Casino and Caesars Online Casino, both have a guaranteed mystery bonus waiting for you to grab and enjoy at the same time. Neither casino is disclosing what the amount will be. The only way to find out is to log in and claim each offer.

Get a guaranteed mystery bonus from Harrah’s Online Casino: May 2-5

If Harrah’s is one of the NJ online casinos where you’re a registered player, all you have to do is log into your account, make a small deposit, and claim the offer. Then before the weekend is over, you are guaranteed to receive a $10, $25, or $50 bonus.

When and how to access the offer

The offer for a guaranteed mystery bonus has been ongoing on since Thursday, May 2.  But it continues all weekend long until 11:59 p.m. Sunday, May 5. So you still have lots of time.

Here are the easy steps you need to follow.

  • Log into your account during the 5/2-5/5 promotion period.
  • Make a qualifying deposit, as indicated on the marketing collateral, using the bonus code MYSTERY.

Note that you can only access this offer once and with a single deposit. Deposits made at the Caesars casino cashier’s cage in Atlantic City or via PayNearMe don’t count.

As soon as your deposit is received, Harrah’s will immediately credit your account with a bonus. Since the amount will be determined randomly, you won’t know how much until you actually get it, but it will be one of three possible amounts: $10, $25, or $50.

Wagering requirements to clear the bonus

All bonuses from this promotion come with the same wagering requirements as other Harrah’s Online Casino bonuses. Depending on your game choice, you will need to wager the following:

  • Slots: 5x bonus
  • Roulette: 25x bonus
  • Video Poker or Blackjack: 50x bonus

If your bonus is $10, you will therefore need to wager a total of $50 for slots, $250 for roulette, or $500 for blackjack. However, the amount you will need to wager increases to $125, $625, or $1,250, respectively, for the three types of games for a $25 bonus or double the amounts for the $25 bonus if you get a $50 bonus.

Obviously, slots should be your game of choice since the wagering requirements are so much less than for the other types of games. But to give yourself a better chance to win, don’t just play any random slot. Your best bet is to clear the bonus exclusively with slots with a 96 percent return to player (RTP) or better.

You have up to seven days to complete the wagering.

Additional terms and conditions

While the wagering is in progress, the bonus, deposit tied to the bonus, and any resulting winnings will all remain on temporary hold in your account. However, as soon as you finish clearing the bonus, as long as you do so on time, all of this money (or whatever is left of it) will become available for you to withdraw. Canceling the bonus, attempting to withdraw unavailable funds prematurely, or failure to complete the required wagering on time will result in forfeiture of both the bonus and any winnings resulting from it.

Get a guaranteed mystery bonus from Caesars Online Casino: May 3-6

The top bonus that you can get this weekend from Harrah’s Online Casino is $50, which is a respectable size bonus. However, some players at Caesars Online Casino will get an even bigger mystery bonus. You could win as much as $250!

Since the offer for the Caesars mystery bonus started on Friday, May 3, a day after Harrah’s, it ends a day later, Monday, May 6 at 11:59 p.m. However, unlike Harrah’s, which doesn’t keep you on pins and needles waiting for your bonus a moment longer than necessary, Caesars makes you wait until Friday, May 10 to finally have your guaranteed mystery bonus revealed and given to you.

That’s a long time to be kept in limbo. Depending on the size of your prize, you may or may not feel the wait was worth it. But here’s the good news. No one walks away from this promotion empty-handed. Caesars can’t promise you a big bonus–and the odds are much more likely you will only get $10 in bonus money–everyone who participates will absolutely, positively get a bonus.

How to access your bonus from Caesars

This special offer is available to all registered account holders. Everyone who claims the offer with a qualifying deposit will be entered in an upcoming prize drawing. All prizes will be in the form of bonus money credited to your account, However, unlike in most drawings, where only a few of the many people who enter win anything, this time everyone’s a winner. Therefore, the one remaining mystery is not whether you’ll win a bonus but how much it will be.

Here’s what you need to do to get your bonus:

  • Log into your account anytime during the 5/3-5/6 promotion period.
  • Click on My Account and then on My Bonuses.
  • Enter the code MYSTERY05. Then click on Get Details.
  • Find the offer for a Mystery Bonus listed under Available Bonuses.
  • Click on Deposit next to the bonus. Then make a single deposit of $10 or more.

As soon as your qualifying deposit is accepted, you will receive one entry into the random drawing taking place on Friday, May 10 to determine the distribution of prizes.

Deposits made at the Caesars Atlantic City casino cashier’s cage or through PayNearMe don’t count. Each player is entitled to one drawing entry only.

If you decide to play before you get your bonus, be careful

From the time you make your qualifying deposit to the time your surprise bonus finally shows up in your account, nearly a week will go by. During this long stretch of time, no play is required. However, Caesars knows that most players will give into the urge and play anyway long before they get their bonus. The danger is that if you’re not careful, you could lose many times the bonus amount and not even have those wagers count towards clearing the bonus. And once you get the bonus, you will indeed be required to make those additional wagers.

By the way, the size of your deposit will have no bearing on the size of your bonus. Since your deposit doesn’t need to be any more than $10, if money is tight, $10 is exactly what you should deposit. Keeping your account balance low until you receive your bonus, and making an additional deposit later, if necessary, will protect your bankroll and keep you from giving into the temptation to play more than minimally, if at all, prior to receiving your bonus.

What will you your bonus be?

On Friday, May 10, Caesars will finally answer this question for you. Only one super lucky player will win the top prize of $250 bonus dollars. Will it be you? Or will you get a $10, $25, or $100 bonus? It all comes down to the luck of the draw.

The following table shows the breakdown for the various size bonuses.

Mystery Prize Drawing:

Prize Matrix

Winners Prize Estimated Value
1 Winner Online Casino Bonus Play ($250) $250
5 Winners Online Casino Bonus Play ($100 per player) $500
Online Casino Bonus Play ($25 per player) $1250

All players other than the first 50 names drawn will win a $10 bonus consolation prize.

But as disappointing as a measly $10 bonus might be, look at it this way. It’s a 100% match on your $10 deposit!

Wagering requirements for the bonus

As soon as the drawing results are determined, Caesars will credit your bonus to your account the same day. What you need to do next is go back to the My Bonuses tab, where the prize you have won will show under Available Bonuses. Click on claim to activate the bonus.

However, before you will be permitted to withdraw either the bonus or any additional related winnings, you will need to meet the casino’s wagering requirements, which are as follows:

  • Slots: 5x bonus
  • Video Poker: 10x bonus
  • All Other Games: 25x bonus

You have up to seven days to complete the wagering. As soon as you do so, you will have full access to both your bonus and any resulting winnings (or whatever remains of this money). However, keep in mind that if you cancel the bonus, attempt to withdraw any available funds prematurely, or fail to clear the bonus on time, you will forfeit both the bonus and any resulting winnings.

Don’t miss your opportunity for two back-to-back mystery bonuses

This weekend you have a chance to dig into not just one good mystery, but two. So if you play at both Harrah’s and Caesars Online Casinos, be sure to opt into both promotions so you can get your guaranteed mystery bonus at both places.


Barbara Nathan
Barbara Nathan is both a professional writer and casino, poker, and sports betting expert. Originally from NYC, she relocated to Absecon, NJ in 2013 just prior to the official launch of New Jersey regulated online casino and poker gambling. Besides keeping tabs on important developments in the industry from day 1, Barbara is very familiar with what each NJ online casino has to offer. Her comprehensive, unbiased reviews and promotion descriptions provide a valuable service to NJ online casino players. Barbara also enjoys volunteering in the Atlantic City community. She is a certified literacy tutor at the Atlantic City Public Library.

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