On-Line Systems in was founded in 1979 in Simi Valley, California, by husband-and-wife, Ken and Roberta Williams. As a programmer for Big Blue, Ken had planned to create business software for personal computers, including the TRS-80. While looking through a host system of programs, discovered the text adventure Colossal Cave Adventure and encouraged Roberta to join him in playing it, and she was enthralled by the game. The pair studied other text adventures, though Roberta quickly became dissatisfied with the text-only format and realized that graphics could enhance the adventure gaming experience. With Ken’s help with some of the programming, Roberta designed Mystery House, inspired by the novel of the same name, using text commands and printouts combined with rudimentary graphics depicting the current setting, making it the first computer adventure game to have graphics. Mystery House was an instant hit, with about 15,000 copies sold, and as a result, the two decided to shift the company’s focus to developing more graphical adventure games.

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Like all our designs, this one is treated with our signature ‘relic-ing’ process which includes our own secret recipe of hand-painted chipping, cracking, fading, and just the right touch of yellowing to ensure that it looks the part of a true vintage imprint.** We lay these works of art down on premium Bella+Canvas 3001 Unisex Jersey Short Sleeve Tees, one of the softest, best-wearing t-shirts available today, via state of the art direct to garment (DTG) printing which allows us to create a vintage effect that simply can’t be accomplished with other printing methods. In short, these shirts are everything you’ve dreamed of and more – it feels soft and lightweight with just the right amount of stretch making it comfortable and flattering for both men and women.

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Not sure what size is your best fit? We recommend taking one of your current t-shirts, laying it flat and measuring it. The measurements in the chart below are taken with the shirt laying on a flat surface. To get the length, measure from the high shoulder point down to the bottom of the shirt. To get the width, measure approximately 1-inch below the armhole, across the chest, from seam to seam. While our tees are all made using premium, pre-shrunk, ring-spun cotton, there can be some shrinkage depending on your personal wash and dry cycles. With that said, if you’re on the fence, we always suggest going up a size.

All sizes are provided in inches!

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*Heather colors are 52% combed and ring-spun cotton/48% polyester. Athletic and Black Heather is 90% combed and ring-spun cotton/10% polyester. Ash color is 99% Airlume combed and ring-spun cotton and 1% poly. **Due to the nature of the printing process and different sizes of shirts offered, imprint position and scale may vary slightly from the product images, but we do our best to be as accurate as possible.