Currently Minecraft versions 1.10 & greater (1.11 etc.) do not play offline.
The issue is exclusive to new builds as version 1.8 works correctly offline.
If the game is unable to connect to the internet when generating a world or loading a saved game the game hard freezes the system.
At this point the system stops responding to all Windows based input (keyboard, ctrl-alt-del, mouse, etc.) & requires lower level actions to unfreeze the system. (Example: power button).
Game does work correctly when internet connectivity is available & is stable.
(Running time 2+ hours on a 1.10 generated saved file in version 1.11.2.)