Home / Games / Under the blue horizon
Under the blue horizon
"Under the Blue Horizon" is an idle simulation game. Play while performing other tasks on your computer! Place your own aquarium anywhere on your screen, coexisting with your work, games, and more!
What players say
Steam review score and the most-helpful voices, which may include critical ones. Score via Steam as of 2026-09-27.
“🧜♀️Under The Blue Horizon Review 🪸 Such a cosy and relaxing game. I absolutely loved the art style and the pastel colours, which give the game a wonderfully calming vibe. There are about 42 different fish to unlock, and the progression system is quite fun. You need to harvest a…”
— a player, Steam review · 64 hrs played“This game is nice, Recommended but it lack of explanation so let me put it here in case First thing first, when you start, you will see - seashell house : the actual use is getting your gold by clicking them(and its a mermaid house) - shrimp net : this one is your fish feed, the…”
— a player, Steam review · 39 hrs played“It's a cheap clone of Rusty's Retirement that copies the mechanics but completely lacks the charm and polish to make it enjoyable. I love marine life so expected to at least enjoy unlocking new fish, but it's a soulless grind that manages to be feel completely unrewarding. The…”
— a player, Steam review · 10 hrs playedPlayer activity
Monthly average concurrent players. Live data self-collected from the Steam API · history through 2026-04 via SteamCharts.
Achievement stats
Global completion rates across all Steam players — a data view of how far people actually get. Source: Steam official stats · as of 2026-09-27.
Price tracking
US-region pricing (USD), sampled twice daily by our own tracker since 2026-09-28. Steam prices vary by region — always confirm your local price on Steam.
Regional prices at last sample, in local currency — Steam sets each region's price independently.
Cheapest → most expensive, converted to USD at ECB reference rates (2026-09-28). Relative comparison only.
Latest official news
Developer announcements via the Steam news API — links go to the original posts. More across all games on the news hub.
New game - “Under the blue horizon - Aquarium” will be free for owned players
We noticed a lot of feedback from people who played our game that they would like to see more idle and fish not die. We wanted to create a smaller version of that game using our existing assets, and t
New feature (Relax Rock) and Small changes
- New Building! : Relax Rock - flip function for buildings - kingdom achievement become more easier (just 4) - fix errors (conversion rate reset, voltech tail, SC-Cropped)
Small new features 2
- Add more detail tutorial - Current fish percentage visualize - Fish Multiplier (*2, 5, 10, 25, 100) - Add glitch mode for placing buildings - Setting value will remain after re-birth - Minor bugs fi
Screenshots
Official Steam store screenshots — click any shot to enlarge.
Facts & details
From the Steam store record, snapshot 2026-09-27.
| Genres | Casual, Indie, Simulation |
| Player tags | Casual · Idler · Simulation · Relaxing · Pixel Graphics · Building · Base Building · Underwater · Farming Sim · Indie · 2D · Colorful (Steam store community voting) |
| Features | Single-player · Steam Cloud · Family Sharing |
| Languages | English * , French * , Italian * , German * , Spanish - Spain * , Japanese * , Korean * , Portuguese - Portugal * , Simplified Chinese * , Traditional Chinese * * |
| Achievements | 21 |
Minimum system requirements (PC)
Minimum: OS: Windows 10 Processor: Intel® Core™ i3 @ 3.2 GHZ Memory: 4 GB RAM DirectX: Version 9.0 Storage: 300 MB available space