15Slide 1.7 was available to download from the developer's website when we last checked. We cannot confirm if there is a free download of this software available. The 15Slide installer is commonly called 15Slide.exe or Csp.exe etc. The actual developer of the software is SoftAKGames. The program is included in Games. The following versions: 1.7, 1.6 and 1.0 are the most frequently downloaded ones by the program users.
From the developer:
15Slide is a computerslide-puzzle game. It's an advanced version of the well-known 15 puzzle. To solve the puzzle you have to original order of randomly shuffled numbered pieces in the least moves possiblen by sliding pieces into the empty spot. 15Slide differs from the original puzzle of 15: except standard board size, it offers number game boards from 4x4 up to 10x10 size and 3 levels of difficulty.
You may want to check out more software, such as Across Lite Mobile, Word Dance or Monsterz, which might be related to 15Slide.