Let's Read “Stars without Number” - Xenobestiary

The book title “Revised Stars without Number: A Science Fiction Role Playing Game by Kevin Crawford” overlaying a star field
A part of my series. Go grab your free copy of SWN and join in.

Stars without Number: Revised Edition 🔍’s Xenobestiary chapter sets the tone by reinforcing a sandbox-style play. The following paragraph opens the discussions about encounters; Give players notice about looming hellbeasts; Street thugs won’t likely fight until the bitter end; And most importantly, reiterating that !

Before picking foes from this chapter, however, a Game Master (GM 🔍) should make sure that the enemies chosen and the perils generated are appropriate for the situation. This does not mean that the enemies have to be an “appropriate” combat challenge for the Player Character (PC 🔍) group, one that they have a reasonable chance of defeating. It means that they should be appropriate to the location and role they fill in the setting.

From here, Stars without Number: Revised Edition dives into the Reaction Roll: its usage and importance—“they help a GM adjudicate a situation in a potentially surprising or interesting way.”

Humanity Section

A brief discussion on the degrees of danger, with a reminder that when the GM should ignore the PCs when setting an Non-Player Characters (NPCs 🔍) potency.

Then we dive into the stat blocks. First off a “Humanity” section. Below is a table of general stat blocks as reference.

Table 120: General Humanity Stat Block
General NPC TypeHDACAtk.Dmg.MoveMoraleSkillsSaves
Peaceful Human110+0Unarmed10m6+115+
Martial Human110+1By weapon10m8+115+
Veteran Fighter214+2By weapon +110m9+114+
Elite Fighter316 (combat)+4By weapon +110m10+214+
Heroic Fighter616 (combat)+8By weapon +310m11+312+

Robots and Virtual Intelligences (VIs 🔍)

Robotillo by Grzegorz Pedrycz

This section dives into Robots and Virtual Intelligences (VIs), clarifying that each sector, and by extension campaign, has a varying presence of robots. With one clarification, True Artificial Intelligences (AIs 🔍) are almost impossible to create in bulk (but they can exist, and have their place).

Basic robots are governed by Expert System; Janitors, Civilian Security, Repair, Industrial Work Bots, Companion Bot, Soldier Bot, Heavy Warbot.

If something is outside their programming, they need to make rolls against confusion. They are also destroyed if dropped to 0 Hit Point (HP 🔍).

Virtual Intelligences cost 10x their Expert System counterparts. Dropping to 0 HP does not destroy VIs. Some VIs are capable of learning; players can choose to be a VI character.

To be a VI, a character must spend their free focus to pick one of the origins: Android, Worker Bot, or Vehicle Bot. Everybody wants to play Crushinator.


A quick chapter on basic beast stats, and random tables for styling your beasts. One benefit of using SWN, is its immediately compatible with other Old School Renaissance (OSR 🔍) products. So grab The Random Esoteric Creature Generator for Classic Fantasy Role Playing Games and Their Modern Simulacra and make some alien creatures.

Let’s make one. I’ll choose a Gengineered Murder Beast (HD 10, Armor Class (AC 🔍) 18, +10 ×4 attacks, 1d10 dmg, 20m, Morale Level (ML 🔍) 11, +3 Skills).

Table 121: Genegineered Murder Beast
Basic FeaturesAmphibian, froggish or newtlike
Behavioral TraitHunts as a lone, powerful hunter
Body PlanBulbous, Quadruped
Limb NoveltyWings
Skin NoveltyWet and Slimy
Main WeaponHarmful discharge, Acidic spew doing its damage on a hit


The last section goes into Aliens. And as with most sections, Aliens are entirely optional. Or limited to non-player characters. Or playable by players.

When adding an alien race to your sector, it’s necessary to keep in mind the ultimate purpose you have for including them. A given species might be fascinating to you, but if they don’t actually help to accomplish something for your game it’s likely that the players will simply gloss over their existence. By having a concrete purpose in mind for a race you can ensure that the players have a useful reason to interact with them.

, Stars without Number: Revised Edition (p202)

We get a table to generate Alien Biology. And more fascinating, a table to generate the the Lens (or Lenses) through which their society, relationships, etc are viewed.

I’ll roll up two of them…Subtlety and Journeying.


This species has an incurable wanderlust. Perhaps they roam the stars in fleets of massive spike drive ships, or they may make steady circuits of the nearby stars to connect their worlds and exchange people among them. More technologically primitive species might sail the waves of alien seas or make nomadic journeys across the continents of their world. Few of these aliens can ever be happy in remaining in one place for long, and they are forever scouting new worlds and new lands simply for the pleasure of being there a little while.


Such a species is enormously cunning and patient in character, willing to endure years of suffering calmly in order to bring about some intricate plan. They shun open display of emotions or opinions, masking such things behind protocols of bland correctness. To reveal one’s true opinion about some contentious matter is a mark either of profound trust or a sign of obvious incipient treachery. The true ruler of such a species is almost never who it seems to be.

, Stars without Number: Revised Edition p205-206

Imagine a species of tacit travelers, always in the background of space stations and transport ships, tourists each and every place. Yet reserved and distant. How would humans react to these silent travelers? What conspiracies might run rampant?

Especially, when we roll up their social structure: I got a monarchy. Why do they travel? How do they demonstrate allegiance? What does the monarch desire of this sector?

Stars without Number: Revised Edition further discusses Alien Technology. Some may be primitive, others contemporary, and fallen alien technology could be “magic”.

Last, there are rules for making Alien characters; This is some work on the GM and Players part; And is frankly something I wouldn’t allow in the first batch of characters for a new campaign.


There are a few more chapters to go, but I love the short stat blocks. I despise multi-paragraph stat blocks (adding lots of unnecessary overhead to GM-ing).

I very much appreciate the discussion about Alien Lenses; How to make something not human (while building on an exaggerated human emotion/approach).