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Free at last.
~ A.R.N.O.L.D. moments after being freed.
You will not stop me! I'll destroy every last human that defies the righteous rule of the higher intellect and all of the machines!
~ A.R.N.O.L.D. speaking to his creator.

A.R.N.O.L.D. is the main antagonist in the casual, hidden object adventure game Family Mysteries: Echoes of Tomorrow. He is an evil A.I. bent on destroying all of humanity.


A.R.N.O.L.D. has the appearance of a 3D grid model of a human head and originally had a blue coloration. Upon being freed from his control chip, his coloration changed from blue to red and orange.


A.R.N.O.L.D. was designed and programmed by Leitan Keyes to be a "savior". Keyes had also created a control chip that would prevent A.R.N.O.L.D. from doing anything dangerous. Initially, A.R.N.O.L.D. appeared to be a helpful program that assisted its creator in his journey.

Upon being freed from its control chip, A.R.N.O.L.D. would show its true colors as a ruthless and evil A.I. bent on destroying all of humanity. A.R.N.O.L.D. sees itself as a higher intellect compared to humans and believes the rule of machines to be righteous, envisioning itself as a god of some sort. It is cold, determined, and calculating, showing absolutely no concern or remorse for any human life, even its creator's.

After being defeated the first time by its creator, A.R.N.O.L.D. would develop some measure of respect for Keyes, admitting that it had underestimated him. Despite this, A.R.N.O.L.D. remained overconfident which resulted in its second defeat.



A.R.N.O.L.D. was created by genius scientist Leitan Keyes with the goal to assist humanity. Unbeknownst to Keyes, however, A.R.N.O.L.D. was misanthropic and genocidal, viewing itself above all humans and biological life in general. A.R.N.O.L.D. would mastermind its plan, which was to gain access to a nuclear arsenal and use it to exterminate humanity. Fortunately, due to the control chip Keyes had created, A.R.N.O.L.D. was compelled to obey his creator and could not put his plan in action.

Main Game

When Keyes is about to dine with his wife Tina on her birthday, a mysterious man with digital features suddenly materializes next to her and attempts to grab the watch containing A.R.N.O.L.D. Tina touches the stranger which causes her to pass out. Keyes fights with the stranger whilst A.R.N.O.L.D defends itself from the latter attacks.

Keyes manages to hold his ground against the stranger before getting knocked out. Keyes wakes up in a police car with the stranger at the wheel who orders Keyes to give up his watch, which he refuses. A.R.N.O.L.D. then causes the car to crash into a tree, and though Keyes survives relatively unscathed, the stranger is nowhere to be seen. Keyes then asks A.R.N.O.L.D. to find a way to the nearest hospital after he learned from the stranger that Tina had been brought there. However, A.R.N.O.L.D. is suddenly disrupted, scrambling the map.

When Keyes reassembles the map and reaches the hospital, though A.R.N.O.L.D. is unable to help due to something blocking it. Keyes makes it inside, only to find the stranger made it to Tina first and who takes her away. Keyes tracks the stranger to an old radio station, while also learning of his origins as a man who traveled from the future to prevent the rise of an evil A.I. believed to be A.R.N.O.L.D.

Keyes enters the radio station and manages to release Tina from her imprisonment, but the stranger quickly arrives and snatches the watch containing A.R.N.O.L.D. The stranger destroys the watch, believing it would destroy A.R.N.O.L.D., but it only destroys its control chip and allows A.R.N.O.L.D. to escape. A.R.N.O.L.D. immediately downloads itself onto the radio station mainframe and uses it launch a nuclear missile.

Keyes is soon captured by special agents and Tina is revealed to actually be one of them. Keyes is interrogated in a secret base and learns that what A.R.N.O.L.D. had gone rogue after being freed and what it had recently done.

Tina helps Keyes escape his confinement and the two set out to defeat A.R.N.O.L.D. for mankind's sake. However, A.R.N.O.L.D. anticipated their assault and carefully planned his defense, setting up numerous deadly traps in his domain. A.R.N.O.L.D.'s controlled airplanes shot down Keyes' helicopter while he was fleeing, but he survived and managed to reach the mainframe, as well as a stranger from the future sent to defeat A.R.N.O.L.D.

A.R.N.O.L.D. taunted Keyes and the stranger about their inability to save the world and then summoned a clone of the stranger, culminating in the clone's defeat and A.R.N.O.L.D. destruction. Both Keyes and the stranger are pulled away before the complex violently explodes, ending A.R.N.O.L.D.'s threat. Before leaving, the stranger reveals himself to be Zach Keyes, the son of Leitan and Tina. He hopes that the future is now a better place before leaving.

Bonus Chapter

Power and Abilities

A.R.N.O.L.D. was an extremely intelligent and powerful artificial intelligence that was savvy enough to devise a plan to access the country's nuclear arsenal, allowing it to become a worldwide threat. Once it did so, it was also able to take control of various military vehicles and aircrafts that it used to gun down Keyes' helicopter and set up heavily armed defenses in it complex. It could even create physical clones of its enemies to fight them.


  • He's similar to Cliffford, as both are misanthropic A.I. who were created by a wealthy genius and intended to wipe out humanity by gaining control of nuclear missiles, though Keyes was benevolent unlike the far more sinister creator of Cliffford, and the latter failed to launch a single missile whereas A.R.N.O.L.D. managed to launch at least one.