Here’s a technical write-up exploring the design and structure of Stardew Valley ’s source code, aimed at developers and modders. Stardew Valley is a beloved farming RPG, but beneath its charming pixel art lies a surprisingly intricate—and famously unconventional—codebase. Created almost entirely by one developer, Eric Barone (ConcernedApe), the source code offers a fascinating case study in solo development, technical debt, and the power of player-led modding. 1. The Framework: XNA and MonoGame The game was originally built with Microsoft’s XNA framework , which handles rendering, audio, and input. XNA was popular for indie games in the early 2010s (e.g., Terraria , Bastion ). After XNA’s deprecation, Barone migrated the code to MonoGame (an open-source implementation), allowing cross-platform releases.