Street Fighter II et al, SNES
This game sinks a full set of teeth into you and just Won't. Let. Go.
Ever.
Ultima VII, PC
Massive, fully explorable and interactive world. Non-linear gameplay. Full NPC scheduling. Day-night cycles. Weather. Fantastic story. Mouse controlled interaction. Real time combat. Even today's games can't squeeze many of these things in, yet Origin did it back in 1992, and with what style!
Daggerfall, PC
At a time when everyone else was plinking around putting D&D games onto the computer and spectacularly failing to produce anything anywhere near as good as the Ultima series years before, one group of developers thought BIG.
You experience, in first person, a world over 162 thousand square kilometres big, with tens of thousands of towns, cities and villages. A branching political story to explore, or cruicially, ignore completely if you so wished.
The sheer size wasn't without it's problems - bugs abound and many players thought it rather dull.. but put some effort in to roleplay yourself and the game becomes a virtual world that provides years of fun.
Strike Commander, PC
Back to Origin for a massively ambitious and oft delayed mega title. Stunning graphics for the time, this wasn't just an F16/F22 game, it was a whole squad management title backed up by a mega storyline you just don't find in flight games.
Beyond Good and Evil, various
This amazingly polished, stylistic game proved that modern games did not have to rely on blood and guts to be excellent. BG&E has a fantastic storyline with vibrant characters and locations that have rarely been matched. Well recieved by critics, but perhaps not enough blood and guts for the general public, who went on to buy the engines later title Prince of Persia in droves.