# Introduction Underground connects the Metro setting with a little bit of steampunk. You can connect any other setting, where you have an underground space with connections. In this RPG you can’t level a character, however your weapons are getting better with upgrades. As a character you have the possibility to collect materials to craft upgrade stuff. Because many materials are very limited you have to manage them in a frugal way. In this system you don’t want to join a fight. This is a golden rule, because fights are… * deadly - because weapons easily kill you with two shots, you will die quickly. * wasteful - Ammunition is expensive, because you pay with ammunition to buy food, weapons and more. However, you need every bullet to fight against monsters. Because there is no leveling system there is no class system. However you can choose between features that replace classes. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://underground-pnp.gitbook.io/rules/introduction.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.