Something that just crossed my mind whilst playing some pokemon red (better than blue, oh yeah, I went there, I threw down the gauntlet ) and was thinking about how would older games be like if they had acheievements or trophies, or what you would need to do to get those trophies. The whole beating the game, and/or beating the game on hard would be the most standard one I think. What other possible ones could they do? For example, imagine doing things like beat zombies ate my neighbours while rescuing everyone. That would be pretty impossible.
One thing I did sometimes with games that I beat was set out my own challenges, people do lots of things like that such as three heart runs of legend of zelda. Things like that makes the game a bit more varied.