Paradox will be holding a Steam sale this weekend to celebrate the publisher's digital convention PDXCon Remixed. As part of the sale, Stellaris, Cities: Stellaris, Cities: Skylines, and Surviving Mars will be free to play all weekend.

Stellaris and Cities: Stellaris and Cities: Skylines are currently the best that their respective genres have to offer: Cities: Skylines reigns supreme in the urban city builder genre, the only bastion in an otherwise unfortunately quiet genre. Cities:Skylines is the pinnacle of urban city-builders, serving as the sole bastion of an otherwise unfortunately quiet genre. Stellaris, on the other hand, is five years old but is arguably the best 4X game set in space, and Cities: Cities:Skylines is proudly ranked in PC Gamer's top 100 best PC games! Surviving Mars recently made a surprise return with a new update, and we look forward to seeing more of this intergalactic colony sim under new developer Abstraction. Because the Paradox game is basically designed to never end.

The sale also features some very good offers across Paradox's entire catalog of games and DLC:

Paradox's sale ends Monday, May 24.