Portal 2
Short description
The "Perpetual Testing Initiative" has been expanded to allow you to design co-op puzzles for you and your friends!
- Developer
- Valve
- Publisher
- Valve
- Release
- Mon, Apr 18, 2011
- Price
- $9.99
- Reviews
- 391,961
- Positive
- 99%
- Followers
- 360,884
- Owners (estimated)
- 5M – 10M
- Concurrent players
- 1,959
- Genres
- Action, Adventure
- Features
- Multi-player, Co-op, Online Co-op, Shared/Split Screen Co-op, Shared/Split Screen, Full controller support, Steam Trading Cards, Captions available, Steam Workshop, Camera Comfort, Custom Volume Controls, Playable without Timed Input, DualShock Controller Support, DualSense Controller Support, Save Anytime, Steam Input API Support, Stereo Sound, Surround Sound, Stats, Includes level editor, Commentary available, Remote Play on Phone, Remote Play on Tablet, Remote Play on TV, Remote Play Together
- Tags
Review count and SteamSpy's owner range agree well enough to narrow the estimate down to this band. Multiplied by $8.78, the average price these copies actually sold for — weighted from the price history rather than taken from the $9.99 launch price. That is 12% below list price on average. Before Steam's cut, VAT and refunds. How these numbers are calculated.
Waiting for Portal 2 to get cheaper? Name your price and we will email you when it gets there.
Media
History
70 data points since Aug 1, 2026. Gaps mean nothing changed — the value carries forward.
The revenue curve is an estimate, not a measurement. It is the only calculated series here: each interval takes the review growth of that period, multiplies it by the sales-per-review factor and by the price actually charged at the time, and adds the result to the running total. That is why it climbs more slowly through discount periods than the review curve next to it. The last point is the same figure quoted above — gross, before Steam's cut, VAT and refunds. How these numbers are calculated.
The blurred area is the rest of the history. 323 further data points reach back to Apr 1, 2011 — your plan shows the last 90 days of it. How far each series in particular reaches is written on its own chart; not every one of them goes back that far. The shape in the blurred area is decoration, not data: the figures are not in this page at all. Plus unlocks the complete series.
Lowest recorded price: $0.99 on Jun 26, 2019.
Similar games that found an audience
Games sharing at least 3 of this title's leading tags, with enough reviews to have gone somewhere. Ranked by how much they overlap, not by how big they are. − missing and + extra mark the tags each one does not share with Portal 2. Studio counts the titles that developer has released — the closest thing to production scale that public data allows. It is not a budget, and nobody publishes those.
| Image | Name | Studio | Shared | Tag difference | Price | Reviews | Positive | Released | Revenue (estimated) |
|---|---|---|---|---|---|---|---|---|---|
|
The Talos Principle 2 | Croteam 22 titles | 4 | − Platformer − Dark Humor + Philosophical + Sci-fi | $29.99 | 12,715 | 95% | Thu, Nov 02, 2023 | $15m $7.6m – $15m |
|
Ugly | Team Ugly first game | 4 | − First-Person − Story Rich + 2D Platformer + 2D | $19.99 | 430 | 96% | Wed, Sep 13, 2023 | $321k $143k – $332k |
|
Eternal Hope | Doublehit Games first game | 4 | − First-Person − Dark Humor + Indie + 2D Platformer | $11.99 | 359 | 84% | Thu, Aug 20, 2020 | $155k $69k – $1.9m |
|
The Crow's Eye | 3D2 Entertainment 2 titles | 4 | − Platformer − Dark Humor + 3D Platformer + Singleplayer | $9.99 | 127 | 72% | Mon, Mar 20, 2017 | $41k $18k – $715k |
|
Portal | Valve 34 titles | 3 | − Platformer − Dark Humor − Story Rich + 3D Platformer + Singleplayer + Sci-fi | $9.99 | 174,886 | 99% | Wed, Oct 10, 2007 | $99.9m $99.9m – $140m |
There are more like this. Your plan shows the 5 closest neighbours; Plus and Pro show up to 100 — enough to see the shape of a niche instead of a sample of it.