by MarcM, 12 February 2026
A new Empire enters the fray with Jim Krohn’s Replicators, the second expansion for his Space Empires 4X series. And with the mechanical Replicators comes a completely different style of gameplay, a new solitaire experience, some visual enhancements and more.
click images to enlarge
GMT released the second printing of Space Empires 4X Replicators along with the fifth printing of the Space Empires and the other expansions, Close Encounters and All Good Things. And the expansion was part of the package the publisher provided me to try out. This second expansion introduces the Replicators, an Empire of Von Neumann (self-replicating) machines. The Replicator Empire doesn’t build units like the other four Empires…they, well, replicate, combine and split, creating gameplay that’s a bit streamlined on one hand, but a little more complicated on the other.
What’s New in Replicators?
Replicators comes with everything you’d expect, a new rulebook, new scenarios, new Empire production sheets and reference cards, new resource cards, empire advantage cards and alien tech cards and a couple of sheets of new counters.
The counters include Replicator ships as well as system markers for them to explore in their home system. You also get a handful of extra standard units for the original Empires and advanced ship counters (Destroyers, Carriers, Fighters, Miners, Scouts, and Flagships). Finally, the counters include a handful of new system markers that change the game a bit:
- Pirates: Hire them for a low, low monthly fee or fight them.
- Fold in Space: This phenomenon skips your ships over to any adjacent hex with no movement cost.
- Regional Map: Uncover it and you can take a peek at adjacent, unexplored system counters.
- Galactic Capitol: This neutral planet is a no-fight zone and offers extra income if connected to a Merchant Pipeline.
The Replicators make the game play differently, and the introduction of terrain tiles make it look different. These full-hex markers let you replace the standard counters for features like asteroids, nebulae, folds in space, supernovas, black holes, warp points, and planets with artwork once you flip the system markers over. The tiles don’t change gameplay, but they give you a better perspective of the “terrain” of space than the small counters and give the game board a colorful boost. The Space Empires board always did feel a little “unrelieved,” shall we say. The tiles fix that. Plus, you can now place your ships on the terrain rather than trying to tuck them around another counter.
Replicators Replicate
Of course, the new Replicator Empire is what really makes the expansion a worthwhile addition to Space Empires 4X, and I’m skipping a fair amount of new stuff and optional rules to focus on them and how they change things. Replicators play completely differently than the four existing Empires, requiring different tactics for both the Replicator player and their opponents. All of the differences are rooted in the idea that these machines can deconstruct themselves to build pretty much everything.
Replicators don’t receive Construction Point income from colonies to research and build like other Empires. The only actual CP income Replicators get comes from exploiting mineral deposits, which they do with mechanical efficiency. They don’t need to waste time transporting minerals back to a colony, once a ship (any ship) encounters them, the income will automatically be applied in the next economic round.
Expansion is also very different for the machine race, and like collecting minerals, it’s fast. When a Replicator ship (again, any ship) discovers a planet in its home system, it can immediately convert itself into a startup colony. This works for barren planets without the Terraforming tech necessary for other Empires. It also works for conquered enemy worlds. In the following Economic Phase, the colony grows to full strength immediately, not over the course of three rounds.
And then all heck breaks loose. While Replicator colonies don’t produce CP income in each Economic Phase, they do replicate more Replicators. Got 11 full-strength colonies? You get 11 new ships, no Shipyards are required. You get those ships each and every economic phase, even if the colonies are blockaded. That adds up to be a bunch of ships.
Replicators handle technology differently. They can purchase Movement and Exploration tech, and a few others, like Minesweeping and Scanning but not much else. They can convert the CP they gain from minerals into Research Points. As they accumulate RP, they can create more advanced ships. Those ships that the colonies replicate each turn? They start as Type 0 ships, with Attack 1, Defense 0, and Hull Size 1. But, 5 RP in, each Replicator colony can produce Type IV ships, with Attack 5, Defense 2. One for each colony, each Economic Phase.
While the colonies are (mostly) restricted to the smaller, hull-1 ships, Replicators can build larger ships as they pass certain RP thresholds. At that point all they need to do is stack smaller ships together at a full-strength colony for a turn. They don’t have to wait for an economic phase like the other Empires. Two hull-1 ships become a hull-2 ship, with more firepower, more defense strength, and a hull that can absorb more hits. They can split a hull-4 ship into four hull-1 ships. Or two hull-2 ships. And back again to a hull-4. Finally, they can exchange ships of the same hull size. So, once they have the RP to access Type-IV ships, a relatively weak Type 0 can become a much more capable Type IV almost instantaneously.
Replicators Assimilate
And the insidious thing about the Replicators is that they assimilate technology they encounter. Once they see it, they can build it or something to counter it. They pick up Attack and Defense technology as soon as you use it in battle. They assimilate ship size too, in a way, gaining the RP they need to access bigger ships when they encounter yours. That’s why one strategy note suggests just sending Destroyers against them, keeping them from gaining easy RP. I didn’t do that.
There are a few more nuances, but those are the major factors that make the Replicators different. Now lets see what happens when we put it all together. You can see the basics of the series explore, expand, exploit, and exterminate gameplay in my Reintroducing Space Empires 4X, so I’m not going to go into that again. Instead, I’m going to focus on the gameplay differences the Replicator Empire adds to the system.
Replicators Expand
The game started well for the Replicators. They rely on colonies to create ships and right out of the gate, their five Type 0 ships were discovering planets and immediately starting colonies. When they didn’t find planets they found minerals, which immediately cached for Construction Points. They banked 30 CP in the first round and were immediately able to purchase a Research Point, starting on the road toward bigger and better ships.
The Terrans didn’t find habitable worlds as easily, and when they did find sites for colonies or minerals for CP, they had to wait for Colony Ships and Mining Ships to reach them to expand and exploit. By round four, the Replicators had 10 colonies to the Terran’s five. The Replicator colonies were launching more ships, so not only did they have more colonies and more ships, they had finished exploring their home system and were ready to venture into deep space toward the Terran Empire.
Once the Replicators finish exploring their home system, they can build Exploration Ships that use Explore Technology. This tech allows the ship to “explore” an adjacent hex by checking out the unrevealed marker before moving. The ship can thus avoid potentially deadly black holes and absolutely deadly Danger markers. Other races can use the tech as well, but only on Cruisers.
Relying on Titans
Another suggested anti-Replicator strategy was to pour income into reaching the point of building Titans. Having a Titan destroy a Replicator planet is one of just a couple of ways you can destroy their colonies and staunch the flow of new ships. So, Titan was my goal. I’d spend CP on ship size and expanding my economy so I could afford to purchase Titans once I could build time. Soon, we’ll see how well that worked for me.
Space Empires 4X Series
(Re)introduction ~ (Re)Learning AAR pt 1 & pt 2 ~ Ground Battles pt 1 & pt 2 ~ Replicators pt 1 & pt 2 ~ All Good Things pt 1 & pt 2 ~ Forum Thread
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