How long did Undertale take to develop?
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Undertale took about 2.7 years to develop. Toby Fox started working on it in May 2013 and released it in September 2015.
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2 years, 4 months, and 13 days, but who's counting? ;)
From May 2013 to September 2015, so around 2.5 years. Man, what a journey!
Just under 3 years. Toby Fox started in 2013 and wrapped it up by 2015.
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