Alt Tests chapter 1
About Alt Tests chapter 1
What the creator says, alongside confirmed listing details.
Alt Tests chapter 1 is a community item for Portal 2 listed on Steam Workshop.
in a parallel world it is 1950 and you are a test subject
Mod details
- Game
- Portal 2
- Creator
- Prost2507
- Category
- Unclassified
- Published
- September 6, 2025
- Last Workshop update
- September 6, 2025
- Workshop item
- #3562850681
Screenshots
1 image from the mod listing
Timeline
Key dates from the original listing and ModOrNot's catalogue.
-
First published
The item was first published on Steam Workshop. Steam listing ↗
-
File last updated
Latest file-change date reported by Steam Workshop. Steam listing ↗
Why it ranks here
Alt Tests chapter 1 currently has 10 subscribers. Recent growth metrics are unavailable; the last calculation was 39d ago.
Metrics from 4 stored snapshots. How ModOrNot ranks mods →
Subscriber change since tracked
View change since tracked
Favorite change since tracked
Platform availability
Availability is only claimed when an official source proves it. A platform we cannot verify is shown as “Not verified” — we never assume a PC Workshop mod runs on a console.
More Portal 2 mods
| Mod | Subscribers | 7d | Score |
|---|---|---|---|
| 199 | +172 | 100.0 | |
| 445 | +17 | 99.9 | |
| 302 | +107 | 99.3 | |
| 137 | +94 | 99.3 | |
| 1K | +227 | 99.2 |
Frequently asked questions
How popular is Alt Tests chapter 1 compared with other Portal 2 mods?
It ranks #65,512 among 183,839 tracked active Portal 2 mods by subscribers — within the top 35.64%. This is a subscriber-based position, not a quality verdict. Counts and placement can change as the catalogue updates.
Is Alt Tests chapter 1 available on PC?
The official Steam Workshop listing establishes PC distribution for Portal 2. This does not verify current downloadability or compatibility with every PC configuration. Official source ↗
When was the mod last updated?
The source listing reports September 6, 2025 as the last file update. A later comment or catalogue refresh does not mean the mod file changed. Official source ↗
What does the ModOrNot Score mean on this page?
It is a 0–100 momentum signal: 50% subscriber-growth velocity relative to mods in the same game, 20% favorite growth, 20% view growth, and 10% update recency. It is not a quality rating. A recent score is unavailable for this mod, so no estimated value is shown.
Are these the real Steam Workshop numbers?
ModOrNot stores public Steam Workshop counts from its collection runs. The totals shown here are the latest counts stored in our catalogue; changes over time are calculated from recorded observations, not invented values. They can differ from the live listing until the next collection.
How is the rank computed?
ModOrNot compares tracked active Portal 2 mods by their current stored subscriber totals. Rank #1 has the most subscribers; equal totals share a rank. The rank is calculated when this page loads and can change as counts or the catalogue change.