We're a week out from the release of Stellaris' 3.0 'Dick'.
It's worth reading the grand strategy games of late, there's actually quite a lot that's free.
With the 'Dick' patch, headline features include a brand new system for first , as well as the concept of building spy networks in foreign empires. You have to send diplomatic envoys now to initiate first with other polities, and these envoys can build up to arming insurgents, and will require you to 'use up' your spy network to initiate.
The free patch will also come with another overhaul to planetary economies and populations. There have been some changes to how building slots work along with industrial districts, and there's plenty of changes to population growth as well, such as new colonies no longer incurring an explicit pop growth penalty.

There are also several new event chains, some new quality of life features, and plenty of balance tweaks and bug fixes. This is the biggest patch the team has released to date, and there's honestly too much to try and summarise in full, although some of the fixes will elicit a chuckle, such as: "Uplift button now works instead of just giving you the sad button noise."
We've covered the majority of Nemesis' features in the past, but just to recap: On top of the new espionage operations, the end game has also been reworked so that before creating a Galactic Empire. Other features include a new ship skin set and some music tracks.
Related: The complete guide to Stellaris DLC
Stellaris: Nemesis will release next week on PC via Steam and the Paradox Store on April 15. There's still time to pre-order, if you're so inclined.