Steam, at least in theory, has Gabe's long ago pledge that they'd un-DRM purchased games if Valve ever went out of business. Whether Gabe or his successor act

Steam, at least in theory, has Gabe's long ago pledge that they'd un-DRM purchased games if Valve ever went out of business. Whether Gabe or his successor actually would honor that pledge today if it happened or even could contractually is a different question.