Portal Steam key art
Portal cover art

Steam revenue analysis

Portal Steam Revenue & Sales Estimates

Valve

$28.8MEst. Gross Revenue

6,398,676 estimated sales, 98% positive reviews, and $21,095,531.50 potentially retained by the developer after Steam's platform fees.

Action98% Positive$9.99MC 90

Revenue Overview

$28.8M

Gross Revenue

$21.1M

Developer Revenue

6,398,676

Est. Copies Sold

$1.5M

Revenue / Year (avg. 19 yr)

$16MLow estimate
$28.8MBest estimate
$48MHigh estimate

How the revenue splits

Gross Revenue
$28,794,042
− Steam Platform Fee(26.7%)
−$7,698,511
Developer Revenue
$21,095,532

Developer vs. Steam

Developer: 73.3%($21,095,532)Steam: 26.7%($7,698,511)

Tiered Fee Structure

Tier 1 ($0–$10M) (30%)$3,000,000
Tier 2 ($10M–$50M) (25%)$4,698,511
Tier 3 ($50M+) (20%)—

More context in the Steam game revenue hub or in the Steam revenue calculator.

How we estimate this

98%positive
177,741Total Reviews
174,186positive (98%)
3,555negative (2%)

Step by step

  1. 1

    Capture Steam review volume as the primary demand signal

    177,741 reviews and a 98% positive rating are used as the starting point because Steam review counts correlate strongly with paid ownership.

  2. 2

    Apply a calibrated Boxleiter multiplier

    For Portal, we use a midpoint multiplier of ×36 and show a wider range from ×20 to ×60 to reflect uncertainty.

  3. 3

    Use a realistic realized sale price instead of only list price

    Rather than relying only on the current price of $10, we estimate a realized average sale price of $5 to account for discounting over time.

  4. 4

    Translate gross revenue into developer revenue

    We then apply Steam's effective fee rate of 26.7%. That turns an estimated $28,794,042 in gross revenue into roughly $21,095,532 retained by the developer.

Calibrated inputs for this game

Avg. sale price

$4.50

List price $9.99

Boxleiter multiplier

×36

Range ×20–×60

Effective Steam fee

26.7%

Tiered 30 / 25 / 20%

Revenue estimates for Portal use the Boxleiter method with a broad range from x20 to x60. For the best estimate we use a calibrated midpoint of x36 and a calibrated average sale price of $5 instead of a flat 30x/0.75 model. Factors like age, price tier, discount history, genre, and review profile all affect the true reviews-to-sales ratio.

Platform Comparison

Hypothetical: What would the developer earn at the same gross revenue?

Steam

Gross revenue baseline: $28,794,042

To developer

$21,095,532

To developer: 73.3%

$21,095,532

Platform fee: 26.7%

$7,698,511

Epic Games Store

Gross revenue baseline: $28,794,042

To developer

$25,458,757

To developer: 88.4%

$25,458,757

Platform fee: 11.6%

$3,335,285

Epic: 0% on the first $1M in annual per-app revenue, then 12%. Effective here: 11.6%.

GOG

Gross revenue baseline: $28,794,042

To developer

$20,155,829

To developer: 70.0%

$20,155,829

Platform fee: 30.0%

$8,638,213

* Actual sales on Epic and GOG are not estimated. Steam's larger user base typically drives substantially higher sales volumes.

Genre Market Position

Top 15% by revenue in Action
15%

Top 15% of Action games

by estimated revenue

0%◆ Median100%

2,141

Top Games Tracked

$6M

Median (tracked top games)

$20.8M

Mean (tracked top games)

Portal ranks in the top 15% of 2141 tracked action top-sellers, with estimated revenue 5× this group's median.

Baseline: HelpfulCalculator's curated set of top-grossing Steam games, not the entire Steam catalog. Niche genres may have small samples.

Playtime & Engagement

7.7h avg2.8h median

7.7h

Average Playtime

2.8h

Median Playtime

2.5h

Recent Activity (2 Weeks)

A median playtime of 2.8h and average of 7.7h suggest a dedicated core community playing this action game well beyond the typical player.

Current Activity32% still active

Game Details

Dataset updated: April 18, 2026

DeveloperValve
PublisherValve
Release DateOctober 9, 2007
Years on Market19 years
Current Price$9.99
Calibrated Avg. Selling Price$4.50
GenreAction
Peak Players638
SteamSpy Owners10,000,000 .. 20,000,000
SteamView on Store

Features

Single-playerSteam AchievementsFull controller supportCaptions availableCamera ComfortCustom Volume ControlsSave AnytimeStereo SoundSubtitle OptionsSurround SoundIncludes level editorIncludes Source SDKCommentary availableRemote Play on PhoneRemote Play on TabletFamily Sharing

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Frequently Asked Questions

How much has Portal earned on Steam?

Based on our analysis using the Boxleiter method, we estimate Portal's total gross revenue on Steam at approximately $28,794,042.

This estimate comes with a confidence range:

  • Conservative estimate (x20): $15,996,690
  • Calibrated midpoint (x36): $28,794,042
  • Optimistic estimate (x60): $47,990,070

The actual revenue may vary due to regional pricing, seasonal discounts, and refund rates.

How many copies has Portal sold on Steam?

With 177,741 Steam reviews and a 98% positive rating, we estimate Portal has sold between 3,554,820 and 10,664,460 copies, with a best estimate of 6,398,676.

This is based on the Boxleiter method, which uses the observation that roughly 1 in every 20 to 60 buyers leaves a Steam review. For the midpoint we do not assume a universal 30x value; we use a calibrated multiplier of x36 that adjusts for the title's age, price tier, genre, and review profile.

How much does Valve earn from Portal?

After Steam's tiered platform fee of effectively 26.7%, Valve keeps an estimated $21,095,532 from Portal's gross revenue of $28,794,042.

Here's the breakdown:

  • Gross Revenue: $28,794,042
  • Steam's Fee (26.7%): -$7,698,511
  • Developer Revenue: $21,095,532

Note: This doesn't account for publisher shares, taxes, or development costs.

What percentage does Steam take from Portal?

Steam uses a tiered revenue sharing model that reduces the platform's cut as a game earns more:

  • First $10 million: 30% to Steam, 70% to developer
  • $10M to $50M: 25% to Steam, 75% to developer
  • Above $50M: 20% to Steam, 80% to developer

For Portal, with an estimated gross revenue of $28,794,042, this results in an effective rate of 26.7%. Steam keeps approximately $7,698,511 and Valve receives $21,095,532.

How accurate are these revenue estimates for Portal?

These estimates use the Boxleiter method, a widely-used industry approach that estimates game sales from the number of Steam reviews.

Factors that affect accuracy:

  • Review-to-purchase ratio varies by genre
  • Discount history - games with frequent deep sales may have higher ratios
  • Regional pricing - different prices in different markets are not captured
  • Refunds - Steam's return policy means some counted sales were refunded
  • Bundled sales - keys sold through third-party bundles may not generate reviews

We provide a confidence range ($15,996,690 to $47,990,070) to reflect this uncertainty. For the best estimate we combine the Boxleiter range with a calibrated midpoint (x36) and a calibrated ASP of $5.

What would Portal earn on Epic Games Store instead?

If Portal generated the same gross revenue on the Epic Games Store, Valve would keep approximately $25,458,757 - that's $4,363,225 more than on Steam.

At this revenue level, Epic's concrete platform fee would be $3,335,285. Epic charges 0% on the first $1 million in annual per-app revenue and then 12% on the remaining amount. On GOG (30% cut), the developer would earn approximately $20,155,829.

Note: This is a hypothetical comparison. Actual sales volumes differ significantly between platforms, and Steam's larger user base typically drives substantially higher sales.

How long do players spend in Portal?

According to SteamSpy data, players spend an average of 7.7 hours in Portal, with a median playtime of 2.8 hours. The large gap between average and median suggests a dedicated core community playing well beyond the typical player.

What is Portal's Metacritic score?

Portal has a Metacritic score of 90/100, which is considered "generally favorable" by critics. The Steam community rates the game 98% positive based on 177,741 user reviews.