instruction: Extract what Operating systems openRA supports from the below text and list them in a seperate line
context: OpenRA is an open source game engine reimplementation and remake of several Command & Conquer games, including Red Alert. It is built using OpenGL and SDL, has support for HiDPI, and is cross platform, supporting Windows, Linux, macOS, and FreeBSD. The engine has support for custom mods via an SDK. The games are remade for modern computers with updated gameplay, new campaigns, user-created and curated maps, and online play. Deviations from the originals included a choice between “right click” and classic “left click” control schemes, an overhauled sidebar interfaces for managing productions, support for game replays and an observer interface designed for video game live streaming. Fog of war that obscures the battlefield outside your units’ line of sight, civilian structures that can be captured to provide benefits and units gain experience as they fight and improve when they earn new ranks. The game supports handicapping players, Discord integration and community ladders. Experimental support for the remastered assets was published in 2023 as a binary compatible yet separate mod.
response: Here are the operating systems supported by OpenRA:
  Windows
  Linux
  macOS
  FreeBSD