Sci-fi setting, Mass Effect Legendary Edition, no multiplayer, single-player campaign, Commander Shepard, iconic N7 armor, squad-based combat, dialogue wheel, Paragon and Renegade choices, Normandy spaceship, diverse alien races, Asari, Turian, Krogan, Salarian, epic space battles, galaxy exploration, planetary landings, Mako vehicle, remastered graphics, enhanced textures, improved lighting, 4K resolution, third-person shooter, RPG elements, character customization, skill trees, romance options, trilogy, Collector's Edition, BioWare, Electronic Arts, action-adventure, science fiction universe, reimagined soundtrack, next-gen consoles, PC gaming, immersive storytelling, decision impacts, critical acclaim, fan-favorite series.