diff --git a/ProjectDescription.md b/ProjectDescription.md
new file mode 100644
index 0000000..574ac3c
--- /dev/null
+++ b/ProjectDescription.md
@@ -0,0 +1,22 @@
+# T21 – Steam Game Catalog
+
+A searchable catalog of 100,000+ Steam games. Users can search by title, filter and sort the full result set, open a detail view for each game, and leave ratings, reviews and personal play-list statuses that are stored on our server.
+
+## Data
+The database is seeded from the [Steam Games Dataset](https://www.kaggle.com/datasets/fronkongames/steam-games-dataset) (Fronkon Games, MIT). A small optional sync script may use the Steam API to refresh selected games. The app itself only reads from our own database.
+
+## Tech stack
+- **Frontend:** React + TypeScript (Vite), Apollo Client for state management, an accessible component library (React Aria / Radix)
+- **Backend:** Node + TypeScript with Apollo Server (GraphQL), running on port 3001
+- **Database:** PostgreSQL with Prisma, run directly on the group VM (no Docker)
+- **Hosting:** Apache serves the frontend at `/project2` and proxies GraphQL requests to the backend
+- **Quality:** ESLint, Prettier, Vitest (components and API), Playwright (end-to-end)
+
+## How we meet the requirements
+- **Search:** case-insensitive title search with debounced input, backed by a trigram index in Postgres
+- **Large result sets:** cursor-based pagination with infinite scroll
+- **Sorting and filtering:** done on the server across the whole dataset (genre, platform, price, release year, rating)
+- **Details:** a dedicated detail view for each game
+- **User-generated data:** ratings, reviews and play-list status (want to play / playing / completed), stored in Postgres
+- **Accessibility:** semantic HTML, keyboard navigation, `jsx-a11y` linting and automated axe tests
+- **Sustainability:** lazy-loaded small images with an option to turn them off, minimal GraphQL queries, caching, compression and dark mode