Escape Game Leeuwarden [Outdoor]

The city is in turmoil as Doctor Crypto has taken several people hostage and locked them in hermetically sealed rooms. He demands a hefty bucket of ransom for each hostage, which must be paid before the clock hits zero! It's up to you to free the hostages. The city has given you enough money to redeem the hostages, but if you can free them in some other way, you can keep the money saved for yourself. Several clues are hidden in the city that can help you unravel the codes. And with the right codes you can open the rooms. Take action before it's too late. Do you have enough code crackers and 'brains' at home during this tablet game…