Protocol
Short description
By signing below, you agree to follow the Protocol. Protocol is a program of strict rules created to make first contact with an alien life form that got shot down in the Arctic Circle.
- Developer
- Fair Games Studio
- Publisher
- Sad Horse studio
- Release
- Tue, Nov 20, 2018
- Price
- $8.99
- Reviews
- 304
- Positive
- 74%
- Followers
- 4,191
- Owners (estimated)
- 20K – 50K
- Concurrent players
- n/a
- Genres
- Action, Adventure, Indie
- Features
- Full controller support
- Tags
Review count and SteamSpy's owner range agree well enough to narrow the estimate down to this band. Multiplied by $8.87, the average price these copies actually sold for — weighted from the price history rather than taken from the $8.99 launch price. That is 1% below list price on average. Before Steam's cut, VAT and refunds. How these numbers are calculated.
Waiting for Protocol to get cheaper? Name your price and we will email you when it gets there.
Media
History
4 data points since Sep 30, 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.
Lowest recorded price: $4.49 on Aug 25, 2025.
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 Protocol. 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) |
|---|---|---|---|---|---|---|---|---|---|
|
Deliver Us The Moon | KeokeN Interactive 3 titles | 4 | − Dark Humor − Cyberpunk + Space + Sci-fi | $24.99 | 7,456 | 88% | Thu, Oct 10, 2019 | $7.5m $4.5m – $11.2m |
|
The Wind Road | 甘肃嘉元数字科技有限公司 first game | 4 | − Dark Humor − Cyberpunk + RPG + Martial Arts | $29.99 | 5,918 | 69% | Thu, Jul 09, 2020 | $8m $3.5m – $60m |
|
Hob | Runic Games 3 titles | 4 | − Dark Humor − Cyberpunk + Puzzle + Platformer | $19.99 | 4,639 | 88% | Tue, Sep 26, 2017 | $3.7m $3.6m – $6.6m |
|
Zombotron | Ant.Karlov Games 2 titles | 4 | − Dark Humor − Cyberpunk + 2D + Zombies | $14.99 | 2,959 | 90% | Mon, Apr 22, 2019 | $3m $3m – $3.5m |
|
Trover Saves the Universe | Squanch Games, Inc. 4 titles | 4 | − Singleplayer − Cyberpunk + VR + Comedy | $29.99 | 2,800 | 91% | Tue, Jun 04, 2019 | $2.8m $1.5m – $2.8m |
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.