$84.82

That was the closing price Tuesday for shares of Unity Software, which makes software tools used by video game designers.

The San Francisco company raised $1.3 billion in its initial public offering Friday, selling 25 million shares at $52 each. That valued the company at around $13.7 billion. The stock opened trading Friday at $75 and closed at $68.35. Unity’s CEO is John Riccitiello, who was a co-founder of Elevation Partners venture firm and served two stints as CEO of Redwood City’s Electronic Arts.

Tuesday’s closing price represented a gain of 16%