A WIP 90s western PCs list (still need to add amiga, mac and c64 exclusives):
minirevver.weebly.com/pc-games-ahead-of-their-time-90s.html Preliminary top pick for each year:
Alpha Waves/Continuum (PC/Atari ST, 1990) - First polygonal 3D Platformer?, TP view; bouncing physics,
Catacomb 3D (PC, 1991) - FPS, Maze Shooter; smooth framerate, item inventory, compass, enemies leave corpses, basic radar system
Ultima Underworld: The Stygian Abyss (PC, 1992) - FP Dungeon Crawler RPG; great map feature (lets you add your own notes), Wolfenstein 3D-style engine with slopes and stairs, very large dungeons, non-linear structure, compass, voice acted cutscenes, dialogue trees, swimming and flight, play instruments, in-depth world interaction (fishing, different ways of opening doors, make popcorn with magic), hunger and fatigue, deteriorating weapons, angled ceilings and ceilings with varying height, look up and down, dynamic music system (changes the music on the fly based on your actions),
Dark Sun: Shattered Lands (PC, 1993) - Open World RPG, Top down view, RT exploration/TB battles; non-random encounters, post-apocalyptic fantasy setting, alternate solutions to problems, party creation (or premade option; some interesting new races like half giants and insects/thri-kreen), dialogue trees, fast movement during exploration, start out as a slave (KQ3), mouse-driven interface with tooltips, auto-mapper (can also look around using it), sleep safely at campfires, no banks or trainers, dialogue portraits,
System Shock (PC, 1994/PC, 201?) - FP ARPG/FPS/Survival Horror, P&C hybrid controls; cyberpunk theme, audio logs, cyberspace (zero g environment wich affects the real world), different ammo types for each weapon, slopes, leaning, detailed difficulty options, memorable villain that communicates with the player throughout the game, basic stealth (security systems),
Descent (PC, 1995) - Flight-based FPS, Maze Shooter, Vehicle avatar; Fully 3D environment and enemies, mouse look and strafing, hostage rescue (choplifter?), 3D map screen with manual camera (shows locked doors with color coding), proximity bombs,
Tomb Raider (PC/PS1/SAT, 1996) - 3D Platformer/TPS/Exploration-Based; lock-on feature in combat, jump in each cardinal direction, context sensitive action button, 180 degree turn move, dynamic music changes, some large models, save anywhere (save points on PS1/SAT), no map, skippable cutscenes, nice tutorial except it doesn't show how to fight or pick up items (voiced tour around Lara's house), fairly varied death animations, basic ranking after each level, new gear sometimes shows on Lara's model, strafe and sideway climbing/shimmy (too slow though),
Dungeon Keeper (PC, 1997) & The Deeper Dungeons (PC, 1997) & Gold Edition (PC, 1998) - Dungeon building and management combined with creature caretaking (each creature has its own personality (needs, weaknesses, skills, rival creature)), MP Vs. Battle; top down or isometric view, units gain levels through combat and training, control units one by one in FP view, play as the bad guys, pick up and drop units (8 at once, within conquered areas), good voice acting (the narrator), players can cast spells anywhere they can see without a unit, sacrifice creatures at a temple to gain stronger ones, slap creatures to make them work harder, imprison and/or torture enemies (can convert enemies, torturing can also make parts of the enemy dungeon become revealed), research spells and traps, battle overview message window (lets you use spells and pick up wounded creatures more efficiently), hidden bonus levels and power ups, you sometimes gain the power to keep one creature for the next level (but you won't know beforehand in which levels this happens), sellable room tiles and traps (C&C), you can make unwanted creatures leave by dropping them at an entrance
Starsiege: Tribes (PC, 1998) - FPS/TPS, RTT, Plane vehicles; limited flight via jetpack, three character classes (heavy, medium, light), bases (turrets, ammo stations, command station (control turrets, see station statuses), shops, power generators, radar; can deploy turrets and manually repair stations), team combat and capture the flag, save favorite sets to buy in the shop, open landscape levels, decent char model editor (voice, gender, skin), voice comment hotkeys, zoom feature (several levels), interactive map (waypoints, orders/notes to other players), shoot mines in mid-air for more damage, remote inventory unit (more basic shop, makes you slower), drop items and weapons, mortar aim beacon, skiing (build up speed in slopes),
Homeworld (PC, 1999) - First fully 3D RTS, Space Battles; pretty impressive gfx and sound, persistent units and resources/perma-death, alternate paths?, take over enemy ships, voice acting changes depending on how a fight is going, useful formations,