Steam Deck monthly rotation tracking is basically just a spreadsheet with some hand-wavey metrics attached
People keep asking how I organize my monthly play sessions on the Deck. The short answer is there's no official tool, so I built something that works well enough. Most guides online tell you to install SteamDB or use Steam's native stats, but neither of those actually gives you a clean monthly breakdown of what you're playing. SteamDB's charts are great for price history, not for understanding your personal library rotation. The workaround I landed on involves a combination of Steam's web API and a lightweight Python script. Here's the practical setup.
You need a Steam API key. You can get one free at steamcommunity.com/dev/apikey. It takes about two minutes. Then I use this endpoint: api.steampowered.com/IPlayerService/GetPlayedForPeriod/v0001. It returns hours played and app IDs for a given date range. Most people don't know this endpoint exists, which is why nobody does this cleanly. I run the script on the 1st of every month, pulling the previous 30 days. It outputs a simple CSV with game name, hours played, percentage of total playtime, and last played date. I keep these in a dated folder so I can look back at any month. Here's the thing nobody mentions: Steam counts playtime from the moment you click "Play" on any game in your library, not just the ones you install. So if you own 600 games and spend a weekend grinding one title, that single game can eat 90% of your monthly total. The ratio looks weird on paper until you realize it's working correctly.
One edge case I hit recently: my Deck went into the shop for a screen replacement in mid-October. I had 47 hours logged across the first two weeks of October but zero for the rest of the month. My initial script output looked like garbage, showing only six games instead of my usual thirty or so. I added a clause to the script that checks for steam last login timestamps, and if there's a gap longer than seven days, it marks the month as partial and excludes it from year-over-year comparisons. Saved me from drawing wrong conclusions.
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Why this matters more than you'd think
Steam's store algorithm rewards engagement. If you only play three games all year, your recommendations converge on those same three genres until you're serving content to yourself in a feedback loop. A monthly breakdown exposes when that happens before it gets worse. I also use the data for something most people skip: library pruning. I sort by last-played date and flag anything older than nine months. Half the time I don't remember buying those games, and the other half I uninstalled them for a reason I can't recall. Steam sales are a trap if your historical data shows you never touch discounted purchases.
The manual fallback
If scripting feels like too much overhead, the Deck's native stats screen shows you hours played per game, but it doesn't let you filter by month. It only shows a lifetime total. I spent months trying to find a settings toggle for this before giving up. A simpler alternative is to just screenshot your library view every month end. It's low tech and takes thirty seconds, but it works if you're not interested in automation. I used to do this until I hit the edge case with the repair shop. One thing I want to flag about the API approach: Valve limits you to 100,000 calls per day per key. For a single user this is nowhere near the limit, but if you ever share your script or try to batch process multiple accounts, you'll hit it fast. Just keep that in mind before expanding.
The CSV files I generate average about two megabytes per month across a typical 200-game library. Storage isn't a concern, but searching through text files for specific months gets annoying after six months. I wrote a basic search function into the script that filters by game name or minimum hours, and that has saved me more time than I expected. There's no official Monthly Steam Deck Examples feature from Valve, and there likely won't be one given how they handle Steam Play compatibility data now. The system I described works because it sidesteps Steam's UI limitations entirely. If you want something closer to a done solution, there are community dashboards that connect via your Steam key and render your data in a browser. They're fine, but they're dependent on third-party uptime, and I've lost data twice because a dashboard went offline mid-month. Local files beat cloud-dependent tools for something this routine. Your data, your disk, your control.
