Trackmania(s)
Scythe
Ascension
System Crash
No Man's Sky
Subnautica
Breathedge
Astroneer
Trailmakers
Resonance of Fate
World of Final Fantasy
GR Wildlands
The Fractured But Whole
Just Cause 3
Fable Anniversary
Nier Automata
Indiana Jones & The Infernal Machine
Zweii 1
Super Lucky's Tale
Dead Cells
Cyberian The Time Traveler
Save Me, Mr Tako
Spoorky
Moonlighter
1953 KGB Unleashed
Yearn
Factotum 90

Emu
-------

FF Fables Chocobo's Dungeon
Vagrant Story

In terms of games I'm actually playing right now (as opposed to shit I haven't bothered to uninstall/keep telling myself I'll finish someday), I have:
Quest for Glory IV
Project Highrise
The Colonists
A Hat in TIme
A couple of Minecraft mod packs (yes, I still play Minecraft, what of it?)
Crusader Kings 2

I'm also very strongly considering picking up Factorio in the very near future. Though I'll probably just wait until it's done.

.
.
THAT^

I have to keep batting them down to keep under thirty installed at once so I have more time to focus and complete one (also makes virus scans and general cleaning go a lot faster)

Diablo III
Mass Effect

Titanfall 2
Beneath a Steel Sky

Transistor
ToME

waiting for Wizardry 8 or Gungeon to be on sale.

Currently working on Darksiders 2 and Lords of the Fallen. I currently have installed over 50 games.

Witcher 3
Football Manager 2019
Rollercoaster Tycoon 3
Leisure Suit Larry 7 - Love for Sail
GRID

Dying Light
Kingdom Come: Deliverance
Lords of the Fallen
Mafia III
The Witcher 3

Not playing anything right now. Installed:

Elona
Melty Blood (finished)
Phantasy Star Online
Romance of the Three Kingdoms 13 (finished)
Witcher Enhanced Edition (finished)
Touhou 6 (finished)
Touhou 7 (finished)
Vanilla WoW
Sunless Sea (finished)
Legends of Eisenwald (for whatever reason) (finished)
Darklands
Eye of the Beholder
Crypt of the Necrodancer
Baldur's Gate - The Original Saga
Fallout Tactics
Vampire: The Masquerade - Bloodlines (finished)
Civilization III Complete ("finished")

Here you go. Technically the order would be that in which I meant to finish, but that was long ago, just adding after the current game since then. Date of last save should say a lot about actual playlist, and that's like so:

Eschalon - Book I: May 19, 2017
King of Dragon Pass: Aug 13, 2015 (failure, would need to restart anyway)
Neverwinter Nights (Kingmaker, retail (though also have on GOG)): Feb 18, 2017
Quest for Infamy: Apr 18, 2016 (just at the start, testing it, keep waiting for 2.0 to actually play)
Age of Wonders - Shadow Magic: today
Lords of Xulima: Sep 26, 2018
Serpent in the Staglands: none, just tried to make sure it starts
Epic Pinball: hmm... hiscore.pin should be the one to check? in that case, Sep 3, 2018

The Sims 2
Cosmic Express
Moto Racer
King's Quest 2
I installed Eschalon Book 1 a couple of days ago, but I haven't started it yet.