Earthworm Jim 3D (1999) used a keyframe-based system for its animations. This allowed for very complex movements that would have been difficult to achieve with a contemporary vertex shader
Residential area - LEGO Island (1997). While technologically primitive by today's standards, countless subtleties imbue this open world with a persistent conceptual depth
THPS3 allowed players to mute its soundtrack in favor of each level's ambient bed. These "tracks" have gone mostly unheard thanks to the series' legendary music supervision; you can hear them all in the link below.