Idle Garry's Mod on Steam
Idle Garry's Mod for its Steam trading card badge
Garry's Mod has no real end-state - it's a sandbox, not a game with a campaign to finish - so most of what's worth automating is its Steam trading card badge rather than achievements (it doesn't have a Steam achievement list at all).
Steam Game Idler idles Garry's Mod the same as any other card-eligible title: no need to load into a server or spawn a single prop to make progress toward the badge.
Card Farming
Collect Garry's Mod's trading cards passively without joining a server.
Lightweight Idling
No need to load Source engine maps or addons just to accrue playtime.
Favorites & Auto-Idle
Keep Garry's Mod in a recurring idling rotation without manually restarting it.
What's supported for Garry's Mod
Not every Steam Game Idler feature applies the same way to every game - here's exactly what works for Garry's Mod.
Getting started with Garry's Mod
Download Steam Game Idler
Free for Windows 10/11 - no sign-up, no credit card, roughly a 7 MB installer.
Sign in with Agent Mode
Sign in with your Steam username and password - no local Steam client required.
Find Garry's Mod in your library
Search or browse your owned games list to select it.
Start idling
Click start and let Garry's Mod idle in the background - check progress any time from the dashboard.
Frequently asked questions
Does Garry's Mod have Steam achievements?
No - Garry's Mod has never had a Steam achievement list, so Card Farming and idling for playtime are the main things worth automating for it.
Do I need addons installed to idle Garry's Mod?
No - idling doesn't load the game's content at all, addons included. It only needs the game to appear in your Steam library.
Can I idle Garry's Mod alongside other Source engine games?
Yes - there's no restriction on running it in the same multi-game idling session as other titles, Source-engine or otherwise.
Other games you can idle
Ready to automate your library?
Download Steam Game Idler and get started within minutes. No sign-up required.