If you own the original Surviving Mars (2018), you are eligible to upgrade to Surviving Mars: Relaunched.

Access to Previous Version: Your original copy of Surviving Mars will remain in your library, along with all previously purchased DLCs. It will no longer be possible to buy the original base game, nor additional DLCs for the original version of Surviving Mars (2018) after the release of Surviving Mars: Relaunched*. DLC Inclusion: In Surviving Mars: Relaunched, all DLCs released for the 2018 version are included, no matter if you owned them previously or not. 

Discount Eligibility: An automatic discount of $20 on the standard price $39.99** (discounted price $19.99) will be applied to your purchase of the base game Surviving Mars: Relaunched if the original Surviving Mars is already in your library. The discount will only be applied if you are purchasing it on the same platform and using the same account as your original purchase. The offer cannot be applied across platforms.

*This affects all the platforms that Surviving Mars: Relaunched is released on. 

**The discount on the standard price may vary slightly depending on your local currency and applicable regional pricing policies. Offer cannot be combined with other discounts.

*** If you have bought your key through Paradox Interactive Website, you need to buy the upgrade directly on Steam for the discount to be applied.