Maelstrom is a licensed open source port of the original shareware game for the Macintosh by Ambrosia Software, Inc. It is a fast-action, asteroids-like game, with classic pixel graphics and original sounds.
| App ID | 4239950 |
|---|---|
| App type | Game |
| Developer | Sam Lantinga |
| Publisher | Sam Lantinga |
| Homepage | https://www.libsdl.org/projects/Maelstrom |
| Release date | 1 May 2026 |
| Release state | released |
| Controller support | full |
| Free app | Yes |
| Store page | store.steampowered.com/app/4239950 |
| Last store refresh | 5 hours ago |
Launch options
| # | Executable | Arguments | OS | Description |
|---|---|---|---|---|
| 0 | Maelstrom.exe | windows | ||
| 1 | Maelstrom | linux | ||
| 2 | Maelstrom | macos |
Playing now
1
Updated 2 hours ago
24-hour peak
1
Highest recorded in the last 24 hours
All-time peak
1
12 September 2026 09:59 UTC
Hourly peaks, UTC. All-time peak covers SteamRaw's recorded history.
Regional prices
All Steam store regions, converted to USD at today's exchange rate, compared with the US price. Lowest is the lowest price SteamRaw has recorded for that region.
Loading regional prices…
Price history, US store (USD)
| Date | Price | Regular | Discount |
|---|---|---|---|
| 12 September 2026 06:51 UTC | Free | Free |
| DLC | AppID | Release | Price |
|---|---|---|---|
| No DLC known for this app. | |||
Branches
| Branch | Build ID | Description | Updated | Password |
|---|---|---|---|---|
| public | 23906274 | 25 June 2026 05:27 UTC | ||
| beta | 23906274 | Public beta branch | 25 June 2026 05:24 UTC |
Depots
| Depot | Name | OS | Size | Download | Public manifest | Notes |
|---|---|---|---|---|---|---|
| 4239952 | windows · 64 | 6.11 MB | 3.28 MB | 6724124835264230419 | branches: beta | |
| 4239953 | linux · 64 | 3.58 MB | 2.15 MB | 4870837286719370248 | branches: beta | |
| 4239954 | macos · 64 | 9.77 MB | 4.40 MB | 1328945545840710450 | branches: beta |
A build is one published version of the game's files on a branch. Steam assigns a new build ID every time the developer pushes an update, so this list is the update history of the app. The files inside a build (depot manifests) are only readable with an account that owns the game, which SteamRaw does not have yet, so build contents are not shown.
| Build ID | Branch | Updated | First seen |
|---|---|---|---|
| 23906274 | public | 25 June 2026 05:27 UTC | 6 hours ago |
| 23906274 | beta | 25 June 2026 05:24 UTC | 6 hours ago |
Every appinfo change SteamRaw has observed, grouped by changelist. Tags, features, languages, builds, depots, prices and any other key Steam publishes. Tracking since at least 12 September 2026 05:37 UTC (estimated from the earliest recorded change; the exact first fetch was not stored).
No changes recorded since SteamRaw first saw this app. Every future PICS change will be listed here.
| Changelist | Apps | Packages | Seen | What changed |
|---|---|---|---|---|
| No changelists recorded for this app yet. | ||||
No news for this app.
Full appinfo as delivered by Steam PICS, changenumber 37987784. Also at /api/app/4239950/raw.
{
"appid": "4239950",
"common": {
"name": "Maelstrom",
"type": "Game",
"clienticon": "133af582175616ad7ebd2fc01e60f6ca7d12ae0c",
"icon": "f3c2c9f218393297a57c39ca2e0d68dd8cf5b7c3",
"oslist": "windows,macos,linux",
"osarch": "64",
"osextended": "macos64,macosapplesilicon",
"releasestate": "released",
"linuxclienticon": "6da69ed3d6f753a4cb9f80ae45a7a7b00074fc19",
"controllertagwizard": "1",
"controller_support": "full",
"small_capsule": {
"english": "35b8a820cb75db966fbfe38170eac34a0fe40dba/capsule_231x87.jpg"
},
"header_image": {
"english": "e9f335f96ec13187d24a5439f8337b1561b05e20/header.jpg"
},
"library_assets": {
"library_capsule": "en",
"library_hero": "en",
"library_hero_blur": "en",
"library_logo": "en",
"library_header": "en",
"logo_position": {
"pinned_position": "BottomLeft",
"width_pct": "38.02325581395348",
"height_pct": "64.80017279097967"
}
},
"library_assets_full": {
"library_capsule": {
"image": {
"english": "02cca233e0475b40fcea5b9241bd86aeec279462/library_capsule.jpg"
},
"image2x": {
"english": "02cca233e0475b40fcea5b9241bd86aeec279462/library_capsule_2x.jpg"
}
},
"library_hero": {
"image2x": {
"english": "9e5211fc8c93d5e155fb5b5a12d255582b753098/library_hero_2x.jpg"
},
"image": {
"english": "9e5211fc8c93d5e155fb5b5a12d255582b753098/library_hero.jpg"
}
},
"library_hero_blur": {
"image": {
"english": "9e5211fc8c93d5e155fb5b5a12d255582b753098/library_hero_blur.jpg"
}
},
"library_logo": {
"image": {
"english": "59ef401a3c64e966534a9fe53916a637548deb7a/logo.png"
},
"image2x": {
"english": "59ef401a3c64e966534a9fe53916a637548deb7a/logo_2x.png"
},
"logo_position": {
"pinned_position": "BottomLeft",
"width_pct": "38.02325581395348",
"height_pct": "64.80017279097967"
}
},
"library_header": {
"image": {
"english": "e9f335f96ec13187d24a5439f8337b1561b05e20/library_header.jpg"
},
"image2x": {
"english": "e9f335f96ec13187d24a5439f8337b1561b05e20/library_header_2x.jpg"
}
}
},
"store_asset_mtime": "1777254593",
"associations": {
"0": {
"type": "developer",
"name": "Sam Lantinga"
},
"1": {
"type": "publisher",
"name": "Sam Lantinga"
}
},
"primary_genre": "37",
"genres": {
"0": "37"
},
"category": {
"category_44": "1",
"category_55": "1",
"category_56": "1",
"category_57": "1",
"category_58": "1",
"category_2": "1",
"category_1": "1",
"category_49": "1",
"category_47": "1",
"category_37": "1",
"category_9": "1",
"category_48": "1",
"category_39": "1",
"category_24": "1",
"category_27": "1",
"category_23": "1",
"category_22": "1",
"category_63": "1",
"category_28": "1",
"category_41": "1",
"category_42": "1",
"category_43": "1"
},
"supported_languages": {
"english": {
"supported": "true",
"full_audio": "true"
}
},
"steam_release_date": "1777647097",
"community_visible_stats": "1",
"community_hub_visible": "1",
"gameid": "4239950",
"store_tags": {
"0": "19",
"1": "1773",
"2": "4637",
"3": "3871",
"4": "3964",
"5": "4791",
"6": "4004",
"7": "3942",
"8": "1755",
"9": "1775",
"10": "113",
"11": "6730",
"12": "1685",
"13": "3841",
"14": "7368",
"15": "3859",
"16": "4182"
},
"review_score": "7",
"review_percentage": "100"
},
"extended": {
"absolutemousecoordinates": "0",
"developer": "Sam Lantinga",
"publisher": "Sam Lantinga",
"homepage": "https://www.libsdl.org/projects/Maelstrom",
"isfreeapp": "1"
},
"config": {
"installdir": "Maelstrom",
"steamcontrollertemplateindex": "4",
"steamdecktouchscreen": "1",
"steamconfigurator3rdpartynative": "15",
"launch": {
"0": {
"executable": "Maelstrom.exe",
"type": "default",
"config": {
"oslist": "windows"
}
},
"1": {
"executable": "Maelstrom",
"type": "default",
"config": {
"oslist": "linux"
}
},
"2": {
"executable": "Maelstrom",
"type": "default",
"config": {
"oslist": "macos"
}
}
},
"steamcontrollertouchtemplateindex": "13",
"steamcontrollertouchconfigfile": "Data/Steam/controller_mobile_touch.vdf",
"app_mappings": {
"0": {
"platform": "linux",
"tool": "SteamLinuxRuntime_4"
}
}
},
"depots": {
"4239952": {
"config": {
"oslist": "windows",
"osarch": "64"
},
"manifests": {
"public": {
"gid": "6724124835264230419",
"size": "6409581",
"download": "3439984"
},
"beta": {
"gid": "6724124835264230419",
"size": "6409581",
"download": "3439984"
}
}
},
"4239953": {
"config": {
"oslist": "linux",
"osarch": "64"
},
"manifests": {
"public": {
"gid": "4870837286719370248",
"size": "3751432",
"download": "2255696"
},
"beta": {
"gid": "4870837286719370248",
"size": "3751432",
"download": "2255696"
}
}
},
"4239954": {
"config": {
"oslist": "macos",
"osarch": "64"
},
"manifests": {
"public": {
"gid": "1328945545840710450",
"size": "10248992",
"download": "4611952"
},
"beta": {
"gid": "1328945545840710450",
"size": "10248992",
"download": "4611952"
}
}
},
"branches": {
"public": {
"buildid": "23906274",
"timeupdated": "1782365235",
"timebuildupdated": "1782364941"
},
"beta": {
"buildid": "23906274",
"description": "Public beta branch",
"timeupdated": "1782365075",
"timebuildupdated": "1782364941"
}
}
},
"ufs": {
"quota": "1000000",
"maxnumfiles": "25"
}
}