According to the inquiry, the "Ruins Library Tank Module" is a mod that simulates the commercial game "Ruins Library", in which the tank refers to an armed vehicle in the game. The name of mod is "Armed Stacking Tanks", which can be downloaded from mod Workshop.

Ruins Library is a game produced and distributed by ProjectMoon. The game was officially released on May 15, 2020. This plot inherits the previous work "Brain Leaf Company". On the ruins, a force called "library" is quietly rising. Players will witness the joys and sorrows of the city from the perspective of the library, meet guests with different styles, and complete a unique "book of wisdom" in the process of library growth.