Maybe Duke Nukem 3D, the level of details (e.g. switches or World complexity) was unmatched for that time, so many things to interact with.
But more memorable for me is Larry Laffer 3... spend hours with my cousins playing it ;) many jokes and sexyness, would be probably not okay to produce a game like this nowadays.
Biggest addiction I had was with Super Mario Bros on NES.
Re: Duke Nukem, I hadn't played it since Atomic Edition in 1999 or so but I recently picked up the "World Tour" expansion (bundled with the PSN version, maybe on Steam) for a couple bucks and gotta say it's a shot of steroids-- it does things with the BUILD engine nobody had conceived of in the 90s. "High Times" is memorable in its technical trickery, and was like discovering Duke again for the first time (it's also the frontrunner map; subsequent maps are good but only moving if you're into seeing IRL landmarks recreated in Minecraft). Check it out if you're feeling nostalgic.
Tangent-- modern Doom games have all been underwhelming, but the Brutal Doom mod (and non-MIDI soundtrack) for the original's WAD files evoked the same feeling of rediscovery for that franchise too. Duke has his own similar renovation project (eduke32 IIRC).
But more memorable for me is Larry Laffer 3... spend hours with my cousins playing it ;) many jokes and sexyness, would be probably not okay to produce a game like this nowadays.
Biggest addiction I had was with Super Mario Bros on NES.