Have a look on https://www.reddit.com/r/battlefield_one/ or https://forums.battlefield.com/en-us/
maybe you will find answer there, and if you ask there will be higher chance of getting an answer (because everyone there have BF 1 :D ).
I can confirm what your friend said about BF3 and BF4, don't know about Hardline.
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Will i be able to play battlefield 1 after first launch? or always need to to login to battlelog for single player too, battlefield 3,4 can be played offline, but my friend told me Bf Hardline cant, can you tell me, (Sorry for broken english)
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