Secret services have located and neutralised a known terrorist who has been hiding out in a deprived area of the city for the last ten years…This is where the good news ends. It turns out that on the roof of an abandoned high-rise the maniac has installed a nuclear warhead with a timer on it.

The building itself has been turned into a tower filled with intricate traps and obstacles. You have been recommended as a specialist in such puzzles, and the secret service has helped you infiltrate the courtyard. The rest is down to you.

Can you get past all the traps and pre-empt a nuclear attack?