1998 is by far and wide the best year in gaming ever. Unlikely (if not impossible) to ever be beaten.
It would be the only year I'd give a 10/10, because it includes the only game I'd give a 10/10. Also, most of my favorites of all-time were released in 1998. The year is the obvious winner in my Top 50 thread list with like double the entries of the next-best year, which is 1997.
Personally I'd add to that list at least on top of some others already posted:









