I play with "fullscreen" checked on, and whenever i command-tab out of the game, and back in again, the dock remains visible at the bottom of the screen. I would then have to uncheck fullscreen, and check it again, as many other people on this forum have indicated.
However, i've noticed today (on accident) that using the "Swipe between full-screen apps" function under "System Preferences > Trackpad > More Gestures" will not cause the dock to show up in-game.
Swipe away. ;)
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