Iterative, Incremental, Big Bang

Iterative, Incremental, Big Bang is a workshop game to encourage people to think about alternative approaches for tackling projects. However, rather than discuss boring work-like scenarios, we’re asking you to decide on an approach for everyday scenarios like converting your loft, cooking Sunday lunch or building a nuclear submarine!

We have produced a variety of games to play with the cards, so you can run sessions with any number of people – from just a couple of people to a room full.



The set comprises two decks of cards:

  • Deck one: 54 white ‘approach’ cards (18 iterative cards, 18 incremental cards, 18 big bang cards)
  • Deck two: 56 black ‘scenario’ cards (46 printed scenario cards + 10 blank cards for you to write your own scenarios)

The cards are printed in full colour on quality gloss board and are plastic coated. Each deck is individually boxed.

BUY THE GAME NOW FOR £20.00 + £9.60 P&P (for delivery to anywhere in the world – tracked where available)

Please note that our customers outside of the UK, including those in the EU, are liable for payment of all import taxes and duties.



How do I play Iterative Incremental Big Bang?

Here are our suggested rules, but you can adapt them for your own purposes or make new ones. We’ve created a page detailing how other people have used IIBB and welcome your suggestions.

Where can I buy Iterative Incremental Big Bang?

Just click on the ‘Buy Now’ button above and you will be taken to a checkout screen.

What is the point of Iterative Incremental Big Bang?

We made the game:

  • as a tool to help people get a basic understanding of what iterative and incremental mean (many people use them the wrong way round!)
  • to question the view that incremental and iterative approaches are always the best approach. For instance, is an iterative approach the best way to create a baby?!
  • to challenge people to look at things from a different perspective — by constructing an argument for something we might not naturally agree with, we often learn a lot.

But those are just the most common uses that we have for the game. You can use the game in different ways.

Is Iterative Incremental Big Bang available in any other language?

It’s currently available in English and Russian.

We produced the English version; our friends at Scrumtrek produced the Russian version. You can buy the Russian version here.

Please feel free to tell us any other language you think we should produce.

Are there expansion packs?

Not yet. Please contact us if you’d pay for more scenario cards though, and we’ll probably make some.

I want to help you make Iterative Incremental Big Bang better.

The game was developed iteratively: we ran lots of sessions to get feedback and made five versions before we went to mass-production. That’s why it’s such an amazing game. We would value any feedback you want to give us which might help the next version be even better (if that’s possible!). 

Is there a Iterative Incremental Big Bang app?

Not yet, but if there’s demand, we will make one.

Can I reproduce Iterative Incremental Big Bang?

You are welcome to use the awesome images that we made with Tim Smith from mypoorbrain, but we don’t allow you to reproduce the game physically or digitally (mainly because we don’t trust you to make it look as amazing as we did).


What if I want to buy more than one set?

Each set (comprising rules, one deck of approach cards and one deck of scenario cards) costs £20 + a one-off shipping cost of £9.60 for anywhere in the world. If you want to buy more than one set, you can increase the order at the checkout page after clicking the ‘Buy Now’ button above. Please note that our customers outside of the UK, including those in the EU, are liable for payment of all import taxes and duties.

Do you accept BitCoins or other digital currencies?

No, you can only pay through PayPal at the moment.

Is the payment system safe? does not store any of your payment card information and we will never share your personal information with anyone else. Payment is processed by PayPal which then instructs us to ship your purchase as per the details you provided to PayPal.

What’s your privacy policy?

We will never share your information with any third party. Feel free to read our full privacy policy at your leisure.

Can I hide the receipt or include a personal message if I’m buying Iterative Incremental Big Bang as a gift?


Is there wholesale pricing for Iterative Incremental Big Bang? Can I sell it in my store?

We don’t even know what this means but it sounds like a great idea. Please get in touch.

Shipping and returns

Please note that we will do everything we can to get Iterative Incremental Big Bang to you safely and quickly, but if anything is lost or damaged, or you want to return it, we will do everything we can to keep you happy. In short, we generally replace things that arrive severely damaged and, if your order needs to be refunded, we’ll issue your refund within 5 business days from when we sent the email confirming a refund will be made.

How much is postage & packing?

£9.60 for shipping anywhere in the world, regardless of how many sets you order. For example, the P&P for 10 sets is still just £9.60. Please note that our customers outside of the UK, including those in the EU, are liable for payment of all import taxes and duties.

All orders are sent tracked (where available).

Can you send it super fast to me?

If you need it any faster than standard first class delivery, please contact us before you pay.

Can I buy Iterative Incremental Big Bang outside the UK?

Yes, we’ve already shipped sets across Europe, the US and Asia. The cost of postage and packing is £9.60 per order. Please note that our customers outside of the UK, including those in the EU, are liable for payment of all import taxes and duties.

I messed up something else on my order (such as giving you the wrong address)

Contact us and we’ll try to help you sort that out. However, if we’ve already shipped it to the address you gave us, it might be too late.

My order arrived incomplete or damaged.

Contact us, tell us what you ordered and your order number, and we’ll help you out.

My order never arrived.

If you’ve not received your order in one week (UK) or two weeks (rest of the world), check your order confirmation email to make sure your order was successful, then tell us your order number, and we’ll work with you to find out what went wrong.

I bought Iterative Incremental Big Bang but I would like to return my order or I’m unhappy for another reason. What can I do?

We hope that won’t be the case, but please contact us if you are unhappy for any reason.

Do you charge a cancellation fee if I cancel my order?

If we’ve shipped your order already, then the P&P is not refundable and you will have to pay for the cost of sending the set back to us, but we don’t charge cancellation fees.


Are these questions really asked frequently?

Nobody has actually asked these questions yet, but they probably would if we didn’t publish them.

I have a question not answered above. How can I ask it?

If you have another question, feel free to contact us.