What is Wine? The Ultimate Guide to Running Windows Apps on Linux in 2025

For anyone new to the Linux ecosystem, one of the first and most pressing questions is often: “How can I run my essential Windows applications?” For decades, the answer to that question has been a single, powerful word: Wine.

But what is Wine? You’ve heard it mentioned everywhere—in forums, in gaming guides, and as the technology behind Valve’s Steam Deck. It’s often described with the recursive acronym “Wine Is Not an Emulator,” but what does that actually mean?

In 2025, Wine is more than just a hobbyist tool; it’s a critical, mature, and extraordinarily complex piece of software that serves as the foundation for Linux gaming and a vital bridge for countless productivity apps. This guide will be a deep dive into the Wine compatibility layer, explaining what it is, how it differs from emulation, and what its massive impact—fueled by the latest Wine 10.0 release—means for you as a Linux user.

Wine Is Not an Emulator: Unpacking the Famous Acronym

This isn’t just a clever name; it’s the core technical description of the project. To understand Wine, you must first understand what an emulator is.

• An Emulator (like QEMU or a console emulator like SNES9x) simulates hardware. It creates a virtual version of a full computer (e.g., a virtual x86 CPU, virtual graphics card, virtual sound card) and then runs an entire operating system (like Windows) on top of that virtual hardware. This is slow, resource-heavy, and requires a full, licensed copy of Windows.
• Wine (A Compatibility Layer) does the opposite. It doesn’t simulate hardware. Instead, it provides a software-level bridge.

Think of it this way: A Windows application (like Photoshop.exe) expects to talk to Windows. It makes “calls” like, “Hey Windows, draw a window on the screen,” or “Hey Windows, open a file from this path.” These calls are made to Windows Application Programming Interfaces (APIs), which are typically found in files like .DLLs (Dynamic Link Libraries).

Wine provides its own open-source versions of these .DLL files. When Photoshop.exe calls a function in a Windows DLL, Wine intercepts that call and translates it—in real-time—into an equivalent POSIX (Linux) call that the Linux kernel can understand.

It’s not “emulating” a Windows PC; it’s impersonating Windows for the application. It’s a translator, not a simulator. This is why it’s far more efficient and faster than a virtual machine when it works correctly.

The Wine Ecosystem: Proton, CrossOver, and Lutris

Wine itself, the raw, open-source project from WINEHQ.ORG, is a command-line tool. It is incredibly powerful but can be difficult for beginners to manage. A single app might need a specific, older version of Wine, a 32-bit environment (a “prefix”), and three specific DLL overrides to work.

This complexity created the need for user-friendly “front-ends” and “forks” that manage Wine for you.

1. Proton: Wine for Gaming

This is the most famous fork. Proton is Valve’s custom version of Wine, which is integrated directly into the Steam client. When you click “Install” on a Windows-only game on Steam, Valve automatically uses Proton.

Proton bundles Wine with other essential components:

• DXVK: Translates DirectX 9, 10, and 11 calls to the high-performance Vulkan API.
• VKD3D-Proton: Translates DirectX 12 calls to Vulkan.
• Esync/Fsync: Kernel-level patches to improve performance and multithreading.

Proton is the “secret sauce” that makes the Steam Deck possible and is the primary driver for the explosion in Linux gaming. As of 2025, Proton (which is being re-based on the new Wine 10.0) is the gold standard for running Steam games.

2. CrossOver: The Commercial and Corporate Wine

CODEWEAVERS is the main commercial company behind Wine. In fact, they employ many of the lead Wine developers and contribute most of their work back to the upstream Wine project. CrossOver is their polished, commercial product for Linux, macOS, and (as of late 2025) even Linux ARM64.

CrossOver provides a graphical interface, automated installers for popular apps (like Microsoft Office and Adobe Photoshop), and professional support. Buying a CrossOver license is the most direct way to fund Wine’s core development.

3. Lutris and Bottles: The Community Managers

Tools like LUTRIS and Bottles are community-driven, all-in-one managers. They aren’t forks of Wine, but rather graphical front-ends that let you:

• Install and manage multiple versions of Wine, Proton, and other runners at the same time.
• Easily create separate “prefixes” (or “bottles”) for each application, so their settings don’t conflict.
• Apply community-sourced installation scripts and performance tweaks with a single click.

What’s New? The Wine 10.0 Release (January 2025)

Wine development is relentless. Every year in January, a new stable version is released, rolling up a year’s worth of experimental changes. The Wine 10.0 release was a major milestone, bringing features that have been in development for years.

Key improvements in Wine 10.0 (which forms the basis for CrossOver 25 and the upcoming Proton 10.0) include:

• Wayland Driver by Default: The wine-wayland driver is now mature and enabled by default (where X11 isn’t present), offering vastly superior scaling, support for HiDPI, and better integration with modern Linux desktops.
• ARM64EC Support: A massive step for ARM-based Linux devices (like those running Ampere or Snapdragon chips). This allows Wine to run emulated x86-64 code alongside native ARM64 Windows code, a complex but critical feature for modern applications.
• Improved HiDPI Support: Better automatic scaling for applications that aren’t “DPI-aware,” making old apps usable on 4K monitors.
• DirectPlay Improvements: A huge win for retro gamers, as the old DirectPlay networking APIs (used in games like Age of Empires II) have seen significant upgrades.

The Good, The Bad, and The “Prefix”

While modern tools have made Wine incredibly accessible, it’s important to set realistic expectations.

The Good

• Performance: For many applications, especially games using the Vulkan API, performance can be near-native or, in some rare cases, even better than on Windows due to a more efficient kernel.
• Integration: Unlike a VM, Wine apps run on your desktop like native apps. You can pin them to your dock, and they share your file system (if you let them).
• No Windows License: You do not need to own, install, or pirate a copy of Windows. This is a 100% open-source solution.

The Bad and The Ugly

• It’s Not Perfect: This is Wine’s biggest challenge. The Windows API is a massive, poorly documented, moving target. A new app update can break Wine compatibility overnight.
• Anti-Cheat: The single biggest hurdle for Linux gaming. Kernel-level anti-cheat systems (like Ricochet, Faceit, or Vanguard) see Wine as a “debugger” or a “tamperer” and will block the game from launching. While progress is being made (e-g., with EAC and BattlEye), many of the biggest competitive online games are still unplayable.
• The “Prefix” Learning Curve: For advanced use, you must learn about the “Wine prefix.” By default, Wine creates a ~/.wine folder that acts as a fake C:\ drive. Best practice is to create a separate prefix for every application (WINEPREFIX=~/.my-app wine ...). This isolates them, but it’s a concept that trips up most beginners.

How to Use Wine in 2025: The Best Approach

For a new Linux user, here is the recommended path:

1. For Gaming: Use Steam first. Enable “Steam Play (Proton)” in the settings and let Valve handle everything. For non-Steam games, use Lutris or Heroic Games Launcher.
2. For Productivity Apps: Use Bottles. This is the most modern and user-friendly tool for creating separate “bottles” (prefixes) for your productivity apps.
3. For Enterprise Apps: If you need guaranteed, supported access to a critical app like Microsoft Office, buy a CrossOver license.
4. For Learning (The Hard Way): Install Wine directly from your repository (sudo dnf install wine). This is the best way to learn how it really works, but prepare for a steep learning curve of using winecfg, winetricks, and managing prefixes by hand.

A Final Thought

Wine is a technical marvel. It’s a testament to the sheer willpower of the open-source community to reverse-engineer one of the most complex APIs ever created. While once a tool for desperate hobbyists, it has matured into the engine that powers a multi-million dollar handheld (the Steam Deck) and has made “Linux gaming” a genuine reality.

💬  What are your experiences with Wine? Do you have a “holy grail” Windows app you wish would run better on Linux? Share your thoughts and questions in the comments below!