Free PS4 games
PlayStation Plus:

    Call of Duty: Modern Warfare 2 Campaign Remastered
    Rise of the Tomb Raider
    NBA 2K20
    Erica

Free Xbox One games

    Crackdown
    Crackdown 2
    Too Human

Xbox Live Gold:

  - Dunk Lords
  - Portal Knights
  - MX Unleashed

Free Nintendo Switch games

   - Jump Rope Challenge

Free PC games:
Epic Games Store

   - 20XX
   - Barony
   - Sludge Life
   - Superbrothers: Sword & Sworcery EP

Twitch Prime:

   - Art of Fighting 2
   - Baseball Stars 2
   - Blazing Chrome
   - Blazing Star
   - Chroma Squad
   - Dead in Vinland
   - Dungeon Rushers
   - Fatal Fury Special
   - Ironclad
   - The King of Fighters 2000
   - The King of Fighters 2002
   - King of the Monsters
   - Metal Slug 2
   - NeuroVoider
   - Pulstar
   - Samurai Shodown 2
   - Sengoku 3
   - Shaq Fu: A Legend Reborn
   - Shock Troopers 2nd Squad
   - SNK 40th Anniversary Collection
   - Treachery in Beatdown City
   - Vane
   - Warsaw
GOG:

   - Akalabeth: World of Doom
   - Alder's Blood Prologue
   - Ascendant
   - Beneath a Steel Sky
   - Bio Menace
   - Builders of Egypt: Prologue
   - Cayne
   - Delores: A Thimbleweed Park Mini-Adventure
   - Doomdark's Revenge
   - Eschalon: Book I
   - Flight of the Amazon Queen
   - Hello Neighbor Alpha Version
   - Jill of the Jungle: The Complete Trilogy
   - Legend of Keepers: Prologue
   - The Lords of Midnight
   - Lure of the Temptress
   - Postal: Classic and Uncut
   - Sang-Froid: Tales of Werewolves
   - Shadow Warrior Classic Complete
   - Stargunner
   - Sunrider: Mask of Arcadius
   - Teenagent
   - Treasure Adventure Game
   - Tyrian 2000
   - Ultima 4: Quest of the Avatar
   - Ultima Worlds of Adventure 2: Martian Dreams
   - War Wind
   - Worlds of Ultima: The Savage Empire

Uplay:

   - Might & Magic Chess Royale
   - Rabbids Coding

Itch.io:

   - Becalm
   - Death Ray Manta SE
   - Fjords
   - From Orbit
   - The Restless
   - The Things We Lost In The Flood

Free Mobile Games:
Free iOS Games

   - Cytus II

Free Android Games

   - Cytus II

Free Stadia Games:
Stadia Pro

    Crayta: Premium Edition
    Destiny 2
    Get Packed
    Grid
    Gylt
    Just Shapes & Beats
    Kona
    Little Nightmares
    Metro 2033 Redux
    Monster Boy and the Cursed Kingdom
    Orcs Must Die! 3
    Panzer Dragoon: Remake
    Power Rangers: Battle for the Grid
    PUBG
    Spitlings
    SteamWorld Dig
    SteamWorld Dig 2
    SteamWorld Heist
    SteamWorld Quest
    Strange Brigade
    Superhot
    The Turing Test
    West of Loathing
    Zombie Army 4: Dead War