Sources
edit- https://archive.org/details/MacAddict-016-199712/page/n69/mode/2up?q=gridz
- https://archive.org/details/Macworld9801January1998/page/n81/mode/2up?q=gridz
- https://archive.org/stream/macmagazin_german/Mac%20Magazin%201998-09#page/n63/mode/2up/search/gridz
- http://www.insidemacgames.com/news/story.php?ArticleID=6500