The "Multi 21" designation refers to the 21 different languages supported within this repack. In terms of gameplay content, this version includes every piece of official content released between 2004 and 2009:
Re: What Is The Sims 2 Ultimate Collection | EA Forums - 11053826 The Sims 2 Ultimate Collection 2014 Multi 21 Repack Mr DJ
remains one of the most sought-after versions of the classic life simulation game. Originally released by Electronic Arts as a limited-time giveaway in 2014, the Ultimate Collection includes the base game along with all eight expansion packs and nine stuff packs ever released. The "Multi 21" designation refers to the 21