Unlock!: Epische Avonturen

Yes — the app is required to play; it manages the timer, penalties, codes, machines and hints (once downloaded no internet is needed to play) (p.6).

Find the card in the deck with that same number or letter on its back, take it, and reveal it faceup so everyone can see (p.2).

Add the two objects’ numbers and look for the summed number in the deck; by the golden rule a red number can only be combined with a blue number (and you cannot combine letters with numbers) (p.4).

Modifiers are +red or +blue numbers that never match a card; they must be added to a number of the opposite color following the golden rule (p.5).

You must enter the machine card’s number (or the number under a letter) into the app; the app then displays the machine and guides the steps to use it (p.5).

Hidden objects can be revealed with the app’s Hidden Object button (or automatic help); hints are obtained in the app by entering a revealed card’s number (the app may give a second hint or the solution), and Penalty cards impose time loss and must be followed and discarded (pp.6, 4).