RuneHolm is a desktop application designed for PC gamers who manage games across multiple storefronts and launchers, including Steam, Epic Games Store, Xbox, GOG, and Battle.net. Its primary function is to provide a unified view of every installed game, along with detailed information about storage usage, file locations, and play history. The tool scans drives in a read-only manner, mapping where each game resides and identifying duplicate installations, leftover files from uninstalled games, and other unnecessary data such as shader caches, crash dumps, and old update files. RuneHolm presents a clear breakdown of how much space can be safely reclaimed, and users approve each action before any files are removed or moved between drives, with undo support. Key features include a cross-launcher game library map that auto-detects installed games and displays their size, last played date, and playtime. The application also offers live performance monitoring of CPU, GPU, RAM, and disk usage, along with a game mode that quiets background processes. Additional tools cover storage forecasting (estimating when a drive will reach capacity), save game backup reminders, a screenshot and clip organizer, and a cross-launcher playtime dashboard. A deal radar component scans public price APIs to flag discounts that match games already in the user's library or wishlist. Typical use cases involve gamers who have accumulated hundreds of gigabytes of scattered game files and want to free up space without resorting to risky system cleaners or registry editors. The workflow consists of three steps: a read-only scan of all drives and launchers, the generation of a living map that sorts and sizes every game and file, and the selective removal or relocation of content with full user control. RuneHolm explicitly avoids scareware tactics, fake performance boosters, registry cleaning, bundled adware, and any automatic deletion without user approval. The application is designed for Windows PCs and integrates with standard gaming platforms and launchers. It does not move or delete files without explicit user confirmation, and all scans are read-only. The tool is intended for individual PC gamers who want an honest, transparent overview of their storage and performance, without deceptive marketing or placebo features.