The Witcher 3: Wild Hunt will reportedly require 50 GB of hard drive space on PlayStation 4, according to the PlayStation Store's listing for the game in a number of regions, including New Zealand.
This figure is likely rounded up, but this could mean that The Witcher 3 will be the heaviest game on PS4. The biggest games currently available (according to PlayStation Store listings, which don't include patches) are The Last of Us Remastered at 44 GB, Wolfenstein: The New Order at 43.9 GB, and Dragon Age: Inquisition at 41.3 GB.
Neither CD Projekt Red nor Sony have commented on the install size, though the 50 GB figure comes straight from PlayStation Network. On PC, The Witcher 3 requires a minimum of 40 GB hard drive space, and Xbox One requirements haven't been revealed.
CD Projekt Red also recently confirmed with Gamespot that The Witcher 3 will run at 1080p resolution (1920 x 1080) on PlayStation 4, and 900p (1600 x 900) on Xbox One. It will run at 30 frames per second on both consoles.