The sight of Cooper piloting his ship through the spherical wormhole near Saturn never fails to send shivers down our spines, no matter how many times we've seen it.
In a universe measured in light-years, wormholes are often treated in sci-fi as a near-"cheat code" shortcut, an unavoidable "interstellar highway" for cosmic narratives. But if we shift our gaze from the silver screen back to reality—to the cold, hard equations of general relativity—a stark truth emerges: if shortcuts truly existed in the cosmos, they would never be a safe, harmless subway station available on demand.
The Cost of Folding Spacetime
In much of science fiction, wormholes are understood as a way to "take a shortcut": not by moving faster, but by making the path itself shorter.
The most common and intuitive analogy is "paper folding." Imagine marking two distant points on a sheet of paper. If you fold the paper, bringing those points close together, and then poke a hole through them, a journey that once required traveling a great distance can now be crossed in a single step. Conceptually, a wormhole is something similar—it's not about traversing space, but about bending spacetime so extremely that two remote locations are brought directly together.
In physics, such structures aren't pure fantasy. The equations of general relativity do permit solutions resembling "spacetime shortcuts" under extreme conditions. The catch? These solutions are inherently unstable. Based on our current understanding, if left alone, such a "hole" would collapse instantaneously upon formation, leaving no time for anything to pass through.
Thus, sci-fi stories often introduce an additional premise: a tremendous cost is required to forcibly prop open this folded passage. Whether you interpret this cost as counterintuitive energy conditions, unimaginable technology, or a sacrifice on a civilizational scale, it all points to the same thing—a wormhole is never a free shortcut. It is an extremely unstable structure, perpetually on the verge of failure.
This inherent instability is precisely what makes wormholes so compelling in fiction: if we assume a civilization somehow mastered the ability to "fold space," whether it could be used safely and whether it would be worth using become questions fraught with risk and dilemma.
And this is exactly the most valuable aspect when it comes to integrating wormholes into game design.
What Would Really Happen If You Tried to Traverse a Wormhole?
Setting games aside, if a traversable wormhole did exist, crossing it would be nothing like a simple "whoosh." It would be more akin to a desperate gamble on the very edge of physical law.
Step 1: The Reluctantly Propped Passage
A wormhole isn't a naturally open door; it's more like a fragile structure constantly trying to snap shut. In some theoretical models, maintaining exotic energy conditions within its throat region is necessary to prevent collapse—often likened to using an invisible "rod" to forcibly hold spacetime open.
From an engineering perspective, this implies: any delay, any instability, could cause the passage to fail mid-transit.
Step 2: The Trial by Tidal Forces
Upon entering the throat region, the true threat comes from intense variations in spacetime curvature. If the structure's scale is insufficient or its stability poor, the difference in gravitational pull between the front and rear of an object could have catastrophic consequences for a ship's integrity.
In some idealized models, tidal forces can be suppressed to "survivable" levels; in more realistic imaginings, it's more like a gravitational shredder perpetually on the brink of失控.
Step 3: Extreme Shifts in Radiation and Energy
Another often-overlooked risk: during transit, normally benign background radiation could undergo significant blueshifting due to the extreme spacetime geometry. In some theoretical extrapolations, this effect could transform harmless radiation into a lethal torrent of high-energy particles.
This isn't an inevitable outcome, but it serves as a reminder: even if the ship's structure survives, the safety of its crew remains an open question.
When We Put All This Into a 4X Game...
Which brings us—inevitably—from cosmic scales back down to the reality of the game design desk.
As part of the dev team, what we're truly wrestling with isn't "whether wormholes exist in reality," but rather: is this mode of travel, so full of risk, uncertainty, and cost, worth being fully integrated into the core mechanics of a 4X game?
Our lead designer, A-Heng, has repeatedly mentioned in internal discussions that he personally misses the diverse FTL (Faster-Than-Light) systems from the Stellaris 1.0 era. He hopes, in some form, to bring back that feeling where "the choice of movement method itself is a strategic decision" into our own game.
But herein lies the problem.
While wormholes can provide incredibly efficient cross-map mobility on a cosmic scale, introducing such a mechanic doesn't just affect fleet speed. It reshapes the entire map structure, faction borders, and even a player's sense of security.
When a wormhole can facilitate your rapid troop deployment just as easily as it can be used in reverse by neutral or hostile fleets to move freely within your territory, that very "convenience" becomes a source of pressure. Precisely because of this, in our current design philosophy, we lean towards putting control of wormholes back in the players' hands. For commanders who'd rather not face such uncertainty, the game will provide options to close or disable wormholes.
Although some details are still under discussion, in our current plan, wormholes are more likely to make their debut in the mid-game, accompanied by a major universe-level event. As for what this "big event" might be... we'll have to keep you guessing for now. Let your imaginations run wild.
And we genuinely want to hear what you, the would-be leaders, really think!
Feel free to share your thoughts in the comments! If your brainstorm is bold enough, maybe this very mechanic will be implemented according to your ideas in the next test!