Steam
Store data
- UK price
- £6.29
- US price
- $6.29
- Positive reviews
- 88%
- Total reviews
- 8
- Release date
- 9 September 2026
Activity briefingSummary of recorded signals
Steam player data · App 4292170
Planet Nine
- Single-player
- Steam Achievements
- Partial Controller Support
- Steam Leaderboards
- Family Sharing
Concurrent players1Most recent successful sample
Today's peak162/144 samples
Tracked peak9Highest retained daily peak
Steam rating88%8 reviews
Steam metadata
Game information
Details supplied by the Steam store
- App ID
- 4292170
- App type
- Game
- Developer
- haizai ↗
- Publisher
- RED GAUGE STUDIO ↗
- Supported systems
- Windows · macOS
- Genres
- Casual
- Release date
- 9 September 2026
- Last player update
- 22 Oct · 10:12 UTC
Steam store data
System requirements
Supplied by the developer on Steam
Windows
Minimum
- Requirement
- Requires a 64-bit processor and operating system
- OS
- Windows 10 64-bit
- Processor
- Intel Core i5
- Memory
- 4 GB RAM
- Graphics
- DirectX 11 compatible
- DirectX
- Version 11
- Storage
- 400 MB available space
Recommended
- Requirement
- Requires a 64-bit processor and operating system
macOS
Minimum
- OS
- macOS 12.0 (Monterey) or later
- Processor
- Apple M1 or Intel Core i5
- Memory
- 4 GB RAM
- Storage
- 400 MB available space
Launch window
Released 9 September 2026 · Tracking from 9 September 2026
SteamWatch’s first observed day and week; tracking can begin after release. Top Sellers is Steam’s revenue ranking, not a sales estimate.
- Player peak
- 9
- Steam reviews
- 3100% positive
- Twitch peak
- Not recorded
- Price observed
- £5.66
- Top Sellers
- No appearanceNo ranked days
1 player-data day recorded in this window.
- Player peak
- 9
- Steam reviews
- 786% positive
- Twitch peak
- Not recorded
- Price observed
- £5.66
- Top Sellers
- No appearanceNo ranked days
7 player-data days recorded in this window.
Peak 2Average 0Latest 1
24-hour and 7-day views use hourly peaks from ten-minute samples. Longer views use retained daily peaks. Up to 24 recent event markers are shown per layer.
Twitch
Twitch stats
Awaiting the first Twitch sample.
Long-term history
Monthly players breakdown
Calculated from SteamWatch samples
| Month | Peak | Gain | % gain | Average | Avg % gain |
|---|---|---|---|---|---|
| Last 30 days | 4 | -5 | -55.6% | 0 | -85.8% |
| October 2026 | 3 | -6 | -66.7% | 0 | -79.5% |
| September 2026 | 9 | — | — | 1 | — |
Store price Regular price
Daily regional sweep
Regional prices
18 regions checked
| Region | Currency | Regular | Current | Discount | Historical low | Last change |
|---|---|---|---|---|---|---|
| United KingdomGBP · GB | GBP | £6.29 | £5.66 | 10% | £5.66 | No change recorded |
| United StatesUSD · US | USD | US$6.99 | $6.29 | 10% | $6.29 | No change recorded |
| Euro areaEUR · DE | — | — | Unavailable | — | — | No change recorded |
| United Arab EmiratesAED · AE | — | — | Unavailable | — | — | No change recorded |
| AustraliaAUD · AU | — | — | Unavailable | — | — | No change recorded |
| BrazilBRL · BR | — | — | Unavailable | — | — | No change recorded |
| CanadaCAD · CA | — | — | Unavailable | — | — | No change recorded |
| SwitzerlandCHF · CH | — | — | Unavailable | — | — | No change recorded |
| ChileCLP · CL | — | — | Unavailable | — | — | No change recorded |
| ChinaCNY · CN | — | — | Unavailable | — | — | No change recorded |
| ColombiaCOP · CO | — | — | Unavailable | — | — | No change recorded |
| Costa RicaCRC · CR | CRC | CRC 3,750.00 | ₡3.375 | 10% | ₡3.375 | No change recorded |
| Hong KongHKD · HK | HKD | HK$42.00 | HK$ 37.80 | 10% | HK$ 37.80 | No change recorded |
| IndonesiaIDR · ID | IDR | IDR 67,499.00 | Rp 60 749 | 10% | Rp 60 749 | No change recorded |
| IsraelILS · IL | ILS | ₪25.25 | ₪22.72 | 10% | ₪22.72 | No change recorded |
| IndiaINR · IN | INR | ₹359.00 | ₹ 323 | 10% | ₹ 323 | No change recorded |
| JapanJPY · JP | JPY | JP¥999 | ¥ 899 | 10% | ¥ 899 | No change recorded |
| South KoreaKRW · KR | KRW | ₩7,600 | ₩ 6,840 | 10% | ₩ 6,840 | No change recorded |
| KuwaitKWD · KW | KWD | KWD 1.650 | 1.48 KD | 10% | 1.48 KD | No change recorded |
| KazakhstanKZT · KZ | KZT | KZT 2,310.00 | 2 079₸ | 10% | 2 079₸ | No change recorded |
| MexicoMXN · MX | MXN | MX$99.99 | Mex$ 89.99 | 10% | Mex$ 89.99 | No change recorded |
| MalaysiaMYR · MY | MYR | MYR 18.75 | RM16.87 | 10% | RM16.87 | No change recorded |
| NorwayNOK · NO | NOK | 84,00 kr | 84,00 kr | 0% | 84,00 kr | No change recorded |
| New ZealandNZD · NZ | NZD | NZ$ 11.25 | NZ$ 11.25 | 0% | NZ$ 11.25 | No change recorded |
| PeruPEN · PE | PEN | S/.19.25 | S/.19.25 | 0% | S/.19.25 | No change recorded |
| PhilippinesPHP · PH | PHP | P235.00 | P235.00 | 0% | P235.00 | No change recorded |
| PolandPLN · PL | PLN | 29,75 zł | 29,75 zł | 0% | 29,75 zł | No change recorded |
| QatarQAR · QA | — | — | Unavailable | — | — | No change recorded |
| RussiaRUB · RU | — | — | Unavailable | — | — | No change recorded |
| Saudi ArabiaSAR · SA | — | — | Unavailable | — | — | No change recorded |
| SingaporeSGD · SG | — | — | Unavailable | — | — | No change recorded |
| ThailandTHB · TH | — | — | Unavailable | — | — | No change recorded |
| TaiwanTWD · TW | — | — | Unavailable | — | — | No change recorded |
| UkraineUAH · UA | — | — | Unavailable | — | — | No change recorded |
| UruguayUYU · UY | — | — | Unavailable | — | — | No change recorded |
| VietnamVND · VN | — | — | Unavailable | — | — | No change recorded |
| South AfricaZAR · ZA | — | — | Unavailable | — | — | No change recorded |
| CIS (regional USD)USD_CIS · AM | — | — | Unavailable | — | — | No change recorded |
| Latin America (regional USD)USD_LATAM · AR | — | — | Unavailable | — | — | No change recorded |
| Middle East & North Africa (regional USD)USD_MENA · EG | — | — | Unavailable | — | — | No change recorded |
| South Asia (regional USD)USD_SASIA · PK | — | — | Unavailable | — | — | No change recorded |
Positive rating87.5%
Positive reviews7
Negative reviews1
Review history is not available for this range yet.
Recent views use Steam's daily review activity. Longer views use weekly totals, retained by SteamWatch.
About this game
Description
Supplied by the Steam store
🪐 Merge planets and unravel the mystery of the universe!
It's out there somewhere, yet no one has ever found it——the "ninth planet". Collide cute planets together, merge them, and uncover the secret yourself.
🌟 Aim, shoot, merge
Launch a planet like a billiard ball and send it crashing into another of the same kind — they'll merge into one! Grow from tiny Mercury toward the larger planets, one merge at a time. 3-5 minutes per run, played with just a mouse. Perfect for a quick break, and easy to come back to again and again.
🚀 Features
A cast of original, adorable planet characters
A unique physics-based merge system — think billiards, but in space
Merging planets can send others flying your way — deflect them before they cross the line!
A cozy, relaxing space world to get lost in
Playable in 17 languages , including English and Japanese
🏆 Regional and global leaderboards
Your high scores go to both your country's leaderboard and the global one, ranked across daily, monthly, and all-time boards. How far can you climb? And what will you find when you finally reach the ninth planet...?
🎁 Collect as you play
Spend the coins you earn to unlock music, themes and illustrations. The more you collect, the more your own version of the universe changes.
🎵 Music from seventeen creators
The music features six guest composers (neruko / Sentaku / asMi / ꄲꅐ꒒ / Kadan / NemCa) alongside eleven more musicians selected through an open call.
◤◢◤◢◤◢◤◢◤◢◤🎙️STREAMING POLICY🎙️◢◤◢◤◢◤◢◤◢◤◢
Streaming, Let's Plays, and video uploads are welcome. No permission needed, no reporting required.
Monetization through a platform's official features is fine, and the music and sound effects that play during gameplay may stay in the recording.
Full details are on the official site under "Video & Streaming Guidelines".
◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢
Steam gallery
Screenshots
5 available
Steam store extras
Downloadable content
1 available
Steam global stats
Achievements
39 achievements
| # | ||
|---|---|---|
| 01 | Ach Uranus First | 100.0% |
| 02 | Ach Merge First | 99.0% |
| 03 | Ach Neptune First | 99.0% |
| 04 | Ach Saturn First | 98.0% |
| 05 | Ach Neptune 009 | 96.1% |
| 06 | Ach Jupiter First | 95.2% |
| 07 | Ach Uranus 009 | 91.4% |
| 08 | Ach Saturn 009 | 78.0% |
| 09 | Ach Neptune 099 | 67.6% |
| 10 | Ach Play 009 | 66.6% |
| 11 | Ach Planet9 First | 62.8% |
| 12 | Ach Jupiter 009 | 57.1% |
| 13 | Ach Score 9999 | 57.1% |
| 14 | Ach Coin 999 | 51.4% |
| 15 | Ach Uranus 099 | 49.5% |
| 16 | Ach Bh First | 47.6% |
| 17 | Ach Collection 009 | 40.9% |
| 18 | Ach Gallery 009 | 27.6% |
| 19 | Ach Saturn 099 | 27.6% |
| 20 | Ach Planet9 009 | 20.0% |
| 21 | Ach Bgm 009 | 18.0% |
| 22 | Ach Bh Late 033 | 18.0% |
| 23 | Ach Neptune 999 | 16.1% |
| 24 | Ach Theme 009 | 14.2% |
| 25 | Ach Jupiter 099 | 13.3% |
| 26 | Ach Bh 009 | 12.3% |
| 27 | Ach Play 099 | 12.3% |
| 28 | Ach Cat Mode | 10.4% |
| 29 | Ach Uranus 999 | 10.4% |
| 30 | Ach Coin 9999 | 9.5% |
| 31 | Ach Collection 099 | 8.5% |
| 32 | Ach Bh Early 009 | 2.8% |
| 33 | Ach Saturn 999 | 2.8% |
| 34 | Ach Score 99999 | 2.8% |
| 35 | Ach Planet9 099 | 1.9% |
| 36 | Ach Bh 099 | 0.9% |
| 37 | Ach Jupiter 999 | 0.9% |
| 38 | Ach Planet9 999 | 0.0% |
| 39 | Ach Play 999 | 0.0% |
Saved from Steam
Patches
2 tracked updates
Ver.1.0.7 Update
The game window can now be freely resized in windowed mode On non-16:9 screens, black bars are added so the layout stays intact Further improved how player names are shown in the rankings
Read full update on Steam ↗Version 1.0.6 Update
- "My Scores" (Today / This Month) now reset at midnight Japan time (JST), matching the online rankings. - Fixed an issue where some characters in player names were not displayed on the ranking screen. - Adjusted the font size on the ranking screen.
Read full update on Steam ↗
Game activity
Recent changes
Steam events and SteamWatch observations
- SteamPatch
Ver.1.0.7 Update ↗
The game window can now be freely resized in windowed mode On non-16:9 screens, black bars are added so the layout stays intact Further improved how player names are shown in the rankings
- SteamWatchPrice data
Price changed to £6.29
£5.66 → £6.29.
- SteamPatch
Version 1.0.6 Update ↗
- "My Scores" (Today / This Month) now reset at midnight Japan time (JST), matching the online rankings. - Fixed an issue where some characters in player names were not displayed on the ranking screen. - Adjusted the…
- SteamReview activity
1 new Steam review
1 positive · 0 negative.
- SteamReview activity
1 new Steam review
1 positive · 0 negative.
- SteamWatchPlayer data
New tracked player peak
9 concurrent players — the highest daily peak recorded at that point.