In the context of software and gaming, "develop piece" isn't a standard industry term, but it likely refers to one of the following:
Cliff Empire is set in a post-apocalyptic future where the Earth's surface is covered in radioactive fog. Humanity survives on massive artificial "cliffs" built high above the clouds. Lion's Shade Platform: PC (Windows) Cliff.Empire.v1.31.rar
You may be looking for information on a specific development or "Early Access" version of the game. Version 1.31 was a specific update in the game's lifecycle that introduced various balance changes and bug fixes. In the context of software and gaming, "develop