History of massively multiplayer online games - Wikipedia

The Matrix Online - Wikipedia

Klei Entertainment - Wikipedia

PDF) Massively multiplayer online role-playing games: The past, present, and future

Loot box - Wikipedia

PDF) Massively multiplayer online role-playing games: The past, present, and future

Warcraft: Orcs & Humans - Wikipedia

Should Wikipedia Be Responsible for Gaming's History?

Virtual world - Wikipedia

Aion (video game) - Wikipedia

MMORPGs – Massively – multiplayer – online – role-playing games – MMOCG Massively multiplayer online crypto-coin game – BitcoinWiki

Earth & Beyond - Wikipedia

Phantasy Star Online - Wikipedia

Games - Wikipedia