Mneme CE Space Combat

Introduction

Welcome to the Mneme Space Combat wiki - a comprehensive guide to the Mneme variant space combat rules for the Cepheus Engine tabletop RPG system.

These rules provide a streamlined yet tactically engaging system for resolving space combat encounters while staying true to the Cepheus Engine core mechanics.

Chapters

Complete Rule Set
Chapter	Title	Description
1	Introduction	Overview of Mneme Space Combat, key features, and summary of changes
2	Ship Design	Hull types, drives, components, weapons, and construction rules
3	Crew Functions	Major, Assistant, and Automated functions; action limits
4	Combat Mechanics	Initiative, phases, turns, action types, and range bands
5	Actions	Detailed actions for all crew functions by phase
6	Reactions	All reaction types and preparation mechanics
7	Damage and Morale	Damage mechanics, HP, component effects, and morale system
8	Definitions and Tables	Complete reference tables and definitions
9	Sample Ships	Example ship stat blocks and configurations

Quick Reference

Key Concepts

Action Economy: 3 Minor Actions + 1 Reaction per turn for Major Functions; Significant Actions cost 2 Minor Actions; Focused Actions use all 3 Minor + Reaction

Core Mechanic: 2d6 + DM vs TN 8+; Effect = roll - TN (minimum 1 on success); Natural 12 doubles positive effect, natural 2 doubles negative effect

Superiority: DM modifier based on relative resources/numbers; Ranges from DM+1 (2:1) to DM+6 (overwhelming)

Damage: Component HP = Dtons (or 10% ship Dtons for Hull/Structure); Damaged (50%), Disabled (100%), Destroyed (excess spills over)

Common Target Numbers

Standard TNs
Action Type	Base TN	Common Modifiers
Routine/Easy	4+	Familiar tasks
Average	8+	Standard difficulty
Difficult	10+	Complex tasks, adverse conditions
Very Difficult	12+	Challenging circumstances
Formidable	14+	Extreme situations

Weapon Ranges

Range Bands
Range	Distance	Typical Use
Adjacent	<1 km	Ramming, boarding
Close	1 km	Sand casters, pulse lasers
Short	10 km	Beam lasers, point defense
Medium	1,250 km	Combat engagement
Long	10,000 km	Particle beams
Very Long	25,000 km	Meson guns
Distant	50,000 km+	Missile launches

External Resources

Cepheus Engine SRD: Base rules system (CESRD)

Mneme Variant Rules: These rules are a variant of Cepheus Engine; Please credit Mneme Variant Rules when deriving from it

Credits: Written by Justin Aquino and Nicco Salonga; Art by Nicco Salonga

Legal

Disclaimer: These are Variant Rules, specifically called the Mneme variant rules.

Trademarks: Cepheus Engine and Samardan Press are trademarks of Jason "Flynn" Kemp; This Product is derived from the Traveller System Reference Document and other Open Gaming Content

Affiliation: Not affiliated with Mongoose Publishing or Far Future Enterprises; No claim to or challenge to trademarks held by either entity

Contact: blog.gi7b.org or gameinthebrain.com; justinaquino@gameinthebrain.com