nintendo also countered that developers did not generally use the full 650mib capacity of cd-roms, stating that the smaller storage space encouraged developers to focus on gameplay rather than flashy visuals. many cd-rom games are known to simply consist of cartridge sized games alongside a prerendered audio track, or just a copy of a game already released on cartridge. the relatively few games that have ever been released based on full motion video typically have very high production costs and timeframes.