megagame

plural megagames

1. informalA very large, or highly successful, game.

   The Voyage of the Beagle is a megagame of "Twenty Questions," played out on jungle trails, over vast pampas, up and down the Andes, and through the eons of time.

   1996, Jonathan Evan Maslow, Footsteps in the Jungle

   2 more examples

   The graphics and sprites are all wonderfully clear and well thought out, and as usual with Gargoyle/FTL, the design's immaculate. If it's not a megagame, it's only because in gameplay terms it's just a little too similar to Sweevo.

   1987, Marcus Berkmann, Hydrofool (video game review) in Your Sinclair issue 20

   He took the idea from the man who had provided the sleds last year and arranged a megagame of musical chairs. This time they snuck all the chairs out of the dining hall and set them up on the quad in a long oval.

   2013, Elizabeth LaBan, The Tragedy Paper