grisly sound effects. It also included 19 exclusive briefing FMV (full-motion video) clips that were not in any of the PC expansion packs, which had none. All of the videos are shown when the player either starts playing through the operational theatre from the beginning or when all the missions of the theatre are accomplished. In other cases, the briefing text is shown. The FMVs include a general for each side, telling the player the mission objectives; The Allied General Carville later appears in Red Alert 2 while Soviet General Topolov has made no further appearances in the Red Alert series. The Retaliation videos were made available for the PC Red Alert in the modification The Lost Files. This modification adds the Retaliation videos to the Counterstrike and Aftermath missions. The Command & Conquer Remastered Collection officially includes the Retaliation cutscenes, linking them to their respective expansion missions in the same way the mod does. Red Alert Retaliation was released as a download for PSP and PS3 from the PlayStation Network in Europe on March 27, 2008, and in North America on December 3, 2009. Open source 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. Coinciding with the release of Command & Conquer Remastered Collection in 2020, Electronic Arts released the original source code for both Tiberian Dawn and Red Alert through GitHub under the GNU General Public License in collaboration between EA and the Command & Conquer community to aid in the development of mods. The source release has also allowed community developers to produce