By your example, they did gain access to at least one computer and you did need their software to get the game? (Which on paper, sounds very much like a prerequisite for playing the game! *grin* Not to mention the red flag usage of the phrase "played some of the games.")
Steam software is required to purchase and download the games from Steam Internet store. Software is required to play some of the games bought from Steam Internet store, at least those that make use of HTC Vive. If I recall correctly, Steam asks permission to gather information about my computer hardware, and I can refuse it. I can turn Steam software off and play great majority of the games without it. Personally I don't care do I buy & download the games with a WWW browser, FTP client, Steam, or GOG Galaxy. But at least Steam automatically updates the games as soon as official updates come available, and that is convenient. More convenient than looking for newest patches from all over the Matrix site under Products, Members Area (different patch versions under the 2), and where ever else.
Reddit is a WWW forum like this one. Personally I don't like it because there is lots of misinformation that readers quote on other forums. Then again, does it matter where the misinformation comes from?
You know what they say, don't you? About how us MechWarriors are the modern knights, how warfare has become civilized now that we have to abide by conventions and rules of war. Don't believe it. MekWars