Unlocking All Bonus Wallpapers

[Post New]by limelight_918 on Apr 3, 14 11:27 PM
Hi, I have been playing this one for a while now and have successfully completed the game, even all the puzzles without skipping any. A couple of the later slider puzzles were damn difficult though.
After successful completion, I have been able to unlock 24 out of the total 25 wallpapers. The last one is not unlocking despite repeatedly playing the various HOS. It just shows a question mark on the last wallpaper.
Does anyone has any idea how the last wallpaper gets unlocked? Any help would be appreciated. Thanks.

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