GZDoom is a source port of Doom based on an older source port, ZDoom.
GZDoom contains telemetry that it reports back to the developers containing general information about your Operating System, CPU Cores, and OpenGL compatiblity.[1]. GZDoom's developers do not seem to be very good at handling privacy concerns (After all, if this was privacy-concious, it would be opt-in...) and so if you decide to use this program, you should make sure to compile it with the telemtery disabled, and you should make sure that this is the only spyware in the program- there may be more spyware implemented in the future.
1.
GZStats: A quick rundown
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This article was last edited on 5/30/2018
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