Achievements have been in video games for many years, though not in the way we know them now. Goldeneye on the Nintendo 64 rewarded players who completed goals with guns, cheats & special modes, while Spyro 2 on the original PlayStation rewarded players who unlocked 'Skill Points' with extra lives.
However, these achievements really created the foundation that PlayStation's Trophies and Xbox 360's Achievements and Gamerscore were based upon, although they were arguably not as rewarding or satisfying to achieve. As the months go by since the introduction of Trophies to the PS3 on July 2nd 2008, to compete with rival Xbox 360's Achievements and Gamerscore system, the challenges set by developers for Trophies have changed drastically.