Riddlestiltskin

A teenage brainiac and gamer works part-time in an IT department while secretly building a major game company's project from the shadows. When the company excludes her, she embraces a Rumpelstiltskin-like persona and launches a murderous rampage through puzzle games and riddles, giving each victim three chances to guess her name before death. She seeks recognition for her stolen work, revenge against those who erased her, and a public admission of the truth.