You click Singleplayer. You create a new world. The name: "Memory."
This guide will walk you through everything you need to know: what version 1.5.2 offers, why you might need the raw JAR file, legal download methods, troubleshooting, and how to install it without risking your computer or Mojang account. minecraft 1.5 2 jar file download
Avoid "free Minecraft" or "cracked" download sites [5.4]. These files are often modified with malware or bundled with unwanted software. Stick to the official launcher or the SourceForge Minecraft Directory for community-verified tools [5.5, 5.9]. You click Singleplayer
To run the Minecraft 1.5.2 JAR file, you'll need to have Java installed on your computer. Here's how to run the JAR file: legal download methods
How to Install Minecraft Forge for Minecraft 1.5 [Works for 1.5.2]
