Like Sierra's earlier adventure titles, such as "Wizard and the Princess" (1980), AGI games used vector graphics. The PCjr accepted floppy disks with a capacity of 360 kilobytes, and raster graphics would have consumed an excessive amount of disk space. Instead, "King's Quest" drew polygons on the screen, and then colored them. Beginning with AGI version 2, the game engine drew graphics in an off-screen data buffer, then blitted them into video memory. This approach was not just to economize use of system resources; it also prevented the game from revealing hidden objects while it drew the screen.