Start Stellaris in the early days of space travel, when FTL is merely theoretical & a practical drive system has yet to be concieved.
The immortal trait adds +10000000 years to you leader lifespan. The Demigod trait adds +1000 years to your leader lifespan. The Bioengineering trait adds +500 to your leader lifespan
Crystallis Ship Modules Expansion Mod adds 29 new ship modules and technologies. All modules come from RARE technologies.
Stellar Galaxies Mod adds more star density levels selection options to all vanilla sized galaxies.
Metal Maidens Mod adds Metal Maidens from the anime mobile game Metal Waltz / Panzer Waltz