90s-hammer to me is 4th and 5th edition Warhammer Fantasy Battles.
I remember opening the 4th edition box and seeing all the lovely plastic minis. A vast improvement over wrestling with the 3rd edition rulebook at the age of 12 and having no idea where to start.

In fact, I think those spearmen and archers are
still better than the multipart plastics released for 6th edition, only bettered by the 8th edition Island of Blood models. My current High Elf army is, in fact, made up of a mix of the 4th and 8th edition box set models (with metal Eltharion and a bolt thrower replacing the cardstock ones).
Fun gameplay memories include Teclis crushing Thanquol under a mountain with the Assault of Stone spell, Thanquol taking two direct hits from a goblin doom diver and surviving, playing Skaven vs Undead and having the two main infantry regiments on each side spend the entire game in melee against each other and finishing with more models in them than they started with (each magic phase, I'd cast Raise the Dead and add
2D6 skeletons to my unit; he'd then cast Curse of the Horned One on them and turn
D6 of them into clanrats), playing a couple of Mighty Empires map-based campaigns (fudging the ME rules from 3rd ed WFB to 4th) and an Empire wizard (Grey or Celestial) casting the "move through the warp spell onto the unit of Imperial Knights he was part of. The unit is then removed from the board ... and now the wizard can't cast the second half of the spell to re-appear, since he's no longer on the board!
And then there was my friend's skaven regiment of doom(
tm); 70-odd clanrats, with (takes deep breath) Thanquol on screaming bell, Boneripper, Queek Head-taker, Lord Skrolk, a warlord and an army standard bearer in the front rank. Deathmaster Sniktch was probably in there, too. The regiment was the entire 1,500-point army, and he used the army book as the movement tray!