The Year is 1986, and the Dungeoneer's Survival Guide was released by TSR.
A lot was happening in TSR in 1986, none of it good.
But first the good news, in 1985 Unearthed Arcana was released, and weren't we all excited. It was fantastic, new character classes, new horizons, written by EGG.
The Acaeum let me down as well. As did Dragonsfoot. Even D&D Wiki.
Disappointing someone hasn't compiled a chronological list...
Penultimate gem we should take
1. The Dungeoneer's Survival Guide, mid-silver age according to Grognardia 1984-1989.