Hammer++

Windows

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Freedom report

Two barsScore 6.4

Free tierA free tier is on its own pricing page
Open codeNo open-source code on record
Runs widely1 of 6 device platforms
DocumentedPlans, terms and facts published

Hammer++ is ranked #8 of 27 in game level editors on Freedom251. It runs on Windows. There is a free plan.

Hammer++ plans and pricing

All plans

Hammer++ Free Free modification of Valve’s Hammer editor for the Source engine ficool2.github.io · 28 Sept 2026

Compared on game level editors

Free plan: Yes
Level dimensions: 3d
Tilemap tools: No
Terrain tools: Yes
Entity placement: Yes
Prefab or template tools: Yes
Visual scripting: No

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The record

Purpose: Hammer++ is a free modification of Valve’s Hammer editor for the Source engine, intended to be more stable and up to date, with bug fixes and improvements.
Lighting preview: It can simulate Source lighting inside the editor with configurable quality and speed and dynamic updates.
Visual previews: The editor can preview particles, fog, skyboxes, rope physics, render effects and material proxies.
Mapping tools: Features include a 3D gizmo, polygon and sprinkle tools, multiple cordons, brush merging and object placement on floors or ceilings.
Crash recovery: If Hammer++ crashes, it displays a detailed error message and autosaves open VMF files.
File compatibility: Hammer++ saves precise vertex data in VMF files while also saving imprecise data for compilers and compatibility with other Hammer versions.
Keybind limits: The keybind editor cannot assign mouse bindings, and modifier keys may not work for every binding.
Integrations: The download page says HLMV++ is bundled with downloads and can be optionally installed.
Support: The maker directs users to the official Discord to discuss Hammer++.
Download status: The download page lists build 8871, last updated April 14, 2026.
Antivirus issue: The maker says downloads are sometimes marked as malware by antivirus software and advises allowing them or adding an exception.
Compatibility limits: The page says the old Source 2013 Multiplayer version is unsupported and CS:GO support is frozen on build 8864.
Maker affiliation: The site says Hammer++ is not affiliated with Valve Corporation.
Price from: Free

Where it ranks on Freedom251

Best Game Level Editors in 2026#8 of 27

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Sources

ficool2.github.io/HammerPlusPlus-Website/· checked 28 Sept 2026
ficool2.github.io/HammerPlusPlus-Website/features.html· checked 28 Sept 2026
ficool2.github.io/HammerPlusPlus-Website/download.html· checked 28 Sept 2026