Couple of disclaimers to start with: I’m primarily a PC player, even most of the console games I played happened via emulation so I’ll drop stuff from both. I’m also really fond of games willing to try something different, even if they end up mediocre or bad - these ain’t GOTY material.
With that out of the way, here’s a short list of titles I really enjoyed:
Croc: Legend of the Gobbos (PC, PSX, Sega Saturn) - 3D platformer with relatively slow and clunky gameplay (kind of similar to classic Tomb Raider games). Colorful, cute and simple.
Kao the Kangaroo (Dreamcast, PC) - series very similar to Croc though might feel a bit less polished at times. Don’t really care about the sequel even though it’s not a bad game.
Parasite Eve (PSX) - JRPG set in 1990’s New York. Interesting combat system focused on guns and positioning, great art and fun story.
Gothic I & II (PC) - German RPGs with a unique atmosphere and world. Surprisingly open-ended with some of its quests. Has an unusual keyboard-centric control scheme.
Sheep (Mac OS, PC) - game about herding sheep through various wacky levels. Lots of humor.
Metal Wolf Chaos (Xbox) - crazy story about an American president fighting FOR DEMOCRACY in a mech suit, created by From Soft. Has modern ports for PC, PS4 and Xbox One.
Oni (Mac OS, PC, PS2) - the best Ghost in the Shell game without actually being one*. Third person action with a great melee combat, big empty levels and rough difficulty spikes. Has a community made “Anniversary Edition” with fixes and access to mods.
I haven’t played all of the GitS games to back that up.