Every Steam Workshop mod begins its life identical to every other: zero subscribers. The moment a creator hits publish, a countdown starts. Not to some arbitrary deadline — to the 7-day window that determines whether the mod becomes one of the Workshop's compounders or joins the silent majority that never reaches escape velocity.
We talk endlessly about all-time leaderboards and lifetime subscriptions. Those are lagging indicators — the result of months or years of compounding. The far more interesting question is the leading one: what happens in a new mod's first week?
To answer it, ModSignal's live feed watched every mod published to the Steam Workshop in the last 7 days: 6,250 new items, each tracked from its time_created timestamp through its current first-week subscriber count. The results reveal a breakout race that is brutal, fast, and almost entirely decided before a mod is a week old.
The milestone wall: 6,250 in, 6 out
Here is the shape of the first-week breakout race. Of the 6,250 mods published in the last 7 days:
| Milestone | Mods that reached it | Share of new mods |
|---|---|---|
| Published | 6,250 | 100% |
| Reached 100 subs | 535 | 8.6% |
| Reached 1,000 subs | 108 | 1.7% |
| Reached 5,000 subs | 18 | 0.3% |
| Reached 10,000 subs | 6 | 0.1% |
Every one of these is a hard gate. 91% of new mods never reach 100 subscribers in their first week. Of the 8.6% that do, nearly four out of five never get past 1,000. And of the 1.7% that clear 1,000, about nineteen out of twenty stall before 10,000.
Put another way: a mod that survives its first week at 10,000+ subscribers is in roughly the top 0.1% of everything published this week. The average new mod has 85 subscribers after its first week — meaning the median creator who publishes today will have, in seven days, a mod with fewer total installs than a busy Discord server.
The winners: 6 mods crossed 10,000 in their first week
The six first-week 10k+ mods are outliers of the extreme. ModSignal's live feed identified them within days of publication:
- GModOS (Garry's Mod) — 20,359 subs in its first week, the week's #1 new mod
- [B42MP] Frockin Backstage! (Project Zomboid) — 18,491 subs, published Sep 8
- Spider-Man Web Swinging | SWEP (Garry's Mod) — 16,158 subs
- Power Syringes (People Playground) — 15,886 subs
- [B42MP] Frockin Splendor! Vol. 6 (Project Zomboid) — 14,492 subs, published Sep 8
- gm_urbis (Garry's Mod) — 12,899 subs
Garry's Mod claims three of the six — half the entire 10k+ club this week — and the leader GModOS reached 20,000 subscribers in under a week, a pace that puts it on track to be a compounder before its first month is out.
Project Zomboid minted half the first-week breakouts
The single most striking concentration: of the 18 mods that crossed 5,000 subscribers this week, 9 are Project Zomboid — exactly half. Garry's Mod and People Playground each minted 3, and RimWorld 2.
| Game | First-week 5k+ breakouts |
|---|---|
| Project Zomboid | 9 |
| Garry's Mod | 3 |
| People Playground | 3 |
| RimWorld | 2 |
| Dota 2 | 1 |
This is not a coincidence. Project Zomboid's Build 42 migration — which we've documented before — has the entire community re-tooling its mods for the new version. Every one of those Build 42 titles in the week's top winners (Frockin Backstage, Frockin Splendor! Vol. 6, Project Writing [42.20], NPC Bases, This Is Your Life, SideWinder's Placement+, Companion Dogs: DogPack) rides that wave directly. When a major update resets the ecosystem, the mods published into the reset window get a first-week advantage that content published into a stable game simply does not.
Why the first week matters more than any later week
A mod's first 7 days are a self-fulfilling prophecy, and the mechanics are structural:
- Discovery is one-shot. The Workshop's "recently added" surfacing puts almost all of a new mod's organic look at its launch. A mod that doesn't convert its early viewers in the first week rarely gets a second spotlight at the same velocity.
- Ranking compounds from day one. Subscriber count feeds the Workshop's default sort. A mod that hits 1,000 in week one sits in a ranking strata where it keeps getting seen; a mod at 30 sits in the same strata as 4,000 other forgotten launches and stops being discovered at all.
- The window is actually narrower than 7 days. Because the sort favors velocity, the real test is often the first 48-72 hours. The winners in this week's data hit escape velocity almost immediately — GModOS's 20k happened in days, not spread evenly across its first week.
The takeaway: the race is nearly decided before the first update
The Steam Workshop does not gradually sort its new mods over months. It sorts them almost instantly. Of everything published this week, 92% will never reach 100 subscribers, and 99.9% will never reach 10,000 — most of that decided in their opening days.
For a creator, the first week is not the opening act; it is the whole show. A mod that launches into a live ecosystem reset (like Project Zomboid's Build 42) or fills a white-hot niche gets a structural first-week tailwind that a good-but-timed-wrong launch simply cannot match. The mods that will still be compounding a year from now are, overwhelmingly, the ones that already separated themselves in their first seven days.
6,250 mods. 6 winners. The first week decides the rest.