As teased by the studio, Housemarque is making Returnal DLC in the form of a free co-op update. It also will come with a survival mode
Returnal Update 3.0 To Add Campaign Co-Op And New Survival Mode
Returnal's new survival mode is a worthy, weighty addition to
Returnal to get a free update adding co-op campaign in a couple of
Returnal Multiplayer Explained: Is There Co-Op & How Asynchronous
Returnal Ascension Update Brings Co-Op And A Survival Mode To The
Returnal - PlayStation 5 - 21317586
Returnal Steam Key for PC - Buy now
Returnal Campaign Co-op and Survival Mode Ascension Update Release
Returnal' gets a free co-op mode on March 22nd
Returnal: Ascension DLC adds co-op and a new survival mode - Polygon
Returnal Gets a Co-op Mode in Free Update Later This Month - IGN
Returnal Patch 3.03 is Live, Balances Tower of Sisyphus Difficulty
Returnal Co-op Guide: How to Play Online in Returnal Ascension
Returnal free update will add campaign co-op, and new mode