I think you are not factoring inflation when talking about prices of games over time. In 1988, new NES games were $60. That's about $120 in today's money. In 1996 when the N64 launched, games were going for $70 and those prices stayed high for the first year. Then after a while the games dropped to $60. $70 in 1996 is about $110 in today's money.