One of System Shock 2‘s more unusual quirks is its support for four-player co-op. This feature was exceptionally rare in PC gaming during the late nineties, making System Shock 2 a standout among classic immersive sims. For its 25th-anniversary remaster, Nightdive Studios aimed to bring this co-op functionality up to modern standards. However, according to producer Daniel Grayshon, integrating it proved to be a development nightmare worthy of SHODAN herself.
The Technical Hurdles of Cross-Platform Co-op
Speaking on the Nightdive Studios Deep Dive podcast, Grayshon detailed the core challenge: the original System Shock 2 relied on an outdated direct IP connection via DirectPlay. He characterized this as “a very old Windows built-in functionality to do some redirecting somewhere and ultimately try to end up at the destination.” Beyond DirectPlay’s inherent insecurity by modern standards, Nightdive’s ambition for the remaster included robust crossplay support across PS5, Xbox, Switch, and other platforms. “We need to strip this out, completely strip this out. We can’t have direct connections anymore because the consoles will not allow that at all,” Grayshon explained. “We need to construct some kind of lobby system, and we need to tap into PlayStation and Xbox and Switch and all this, and try to get them connecting all together in a crossplay environment.”
This process was “extremely difficult” due to the nuances of how the game’s cooperative play works. “There’s so much that goes into it in terms of things like object ownership,” he says. “When you’re in the game for example, something might be designated a certain number, and then if somebody interacts with that object then the object number becomes the property of somebody else now, and then that data is handed off from that person to that person on their local machine.” Grayshon noted that because of this, “situations can arise from that where ‘Oh well, the local state didn’t kind of clean out properly on this, and now we’ve changed level, so when we go back into it, it doesn’t know the ownership ID of this anymore and it’s completely gone wrong, and now we need to sort it out.’ It was so complicated to work out. But the guys have done an absolutely fantastic job in just unthreading all of this.”
Transforming the Co-op Experience and Gameplay Recommendations
Grayshon describes the updated co-op functionality as “a complete night and day transformation of everything.” Nonetheless, he stresses that multiplayer should not be the initial way someone experiences System Shock 2. “You should probably play it in singleplayer first to get the true experience of System Shock 2,” he advises. “Multiplayer, it’s a different vibe. You don’t feel alone. You don’t feel scared. You don’t feel afraid.”
Nightdive has continued to polish up System Shock 2 since the remaster launched. The recent 1.2 patch notably added support for 26 years’ worth of mods and fan missions, a significant win for the community. In his discussion, Grayshon added that Nightdive hopes to further improve the cooperative functionality in future updates. “I’m looking forward to seeing what improvements we can do to it in the future,” he says. “It’s been so much fun to watch people run through the game and just have fun with it.”