Voadam
Legend
2e gave xp for overcoming monsters.2e had individual awards for class-based things- for instance, thieves got xp for stealing gold- but there was no 'quest xp' until 4e.
(Speaking of cool 4e innovations that were thrown out with the bath water...)
It had story awards as a core part as well though.
2e DMG page 68:
"The other group award [other than overcoming monsters] is that earned for the completion of an adventure. This award is determined by the DM, based on the adventure’s difficulty. There is no formula to determine the size of this award, since too many variables can come into play. However, the following guidelines may help.
The story award should not be greater than the experience points that can be earned defeating the monsters encountered during the adventure. Thus if the DM knows there are roughly 1,200 experience points worth of monsters, the story award should not exceed this amount.
The story award should give a character no more than 1⁄10th the experience points he needs to advance a level. This way the character will have to undertake several adventures before he can advance to the next level."
The individual awards class awards for things like rogues and gold, fighters and more fighting, spellcasters casting spells was an optional rule in the 2e DMG.