Possibly,...
D.A.R.Y.L.
The boy had a cybernetic brain. This allowed him to play
video games with the same reaction time as the game
without error.
His creator knew that the military wanted to use him as a weapon
but the scientist came to see him as a son. The scientist went on
the run with Daryl to keep the military from dissecting the boy to
see how he worked, but he scientist was killed and Daryl's had
amnesia. He was found alone and eventually put in a foster home.
No one knew of his special brain until he told his friend.
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