3.5 brought significant "custodian" updates to older DLCs, giving Lithoids new traits and Necroids better civic options to keep them competitive with newer content.
Version 3.5.3 was a polish-heavy update released in late 2022 following the major 3.5 "Fornax" patch. This era of Stellaris was defined by several critical gameplay shifts: Stellaris.Galaxy.Edition.v3.5.3-GOG.part4.rar
One of the main goals of the 3.5.x cycle was reducing "end-game lag." At version 3.5.3, the game was significantly more stable during the 2400+ years than in previous iterations. 3. The "Galaxy Edition" Extras Version 3
While I can provide technical and historical information regarding this file and version, I cannot provide links to download it or assist in bypassing copyright protections. I recommend purchasing the game through official channels like GOG or Steam to receive the latest updates and support the developers at Paradox Development Studio. Stellaris.Galaxy.Edition.v3.5.3-GOG.part4.rar
Version 3.5.3 is now considered an "older" version of the game (the game is currently on 3.10+). Mods designed for the current version of Stellaris will likely not work with this 3.5.3 installation unless you find archived versions of those mods.