Game Systems

Pick your engine, then run turns fast. This page surfaces table-ready defaults first and sends you to deeper rules only when needed.

At-a-Glance

Start with B/X Quick Start Rules if you want immediate play.
Use Encounter Sequence OSE SRD and Combat Sequence OSE SRD as your default turn backbone.
Use Time, Weight, and Movement OSE SRD when pressure needs to matter.
For weird-tech city missions, pull procedures from Cities Without Number SRD.
For fast rulings and low prep overhead, borrow from Into the Odd and Knave.

Declare intent before rolling: what you want, what risk you accept, what tool you use.
Assume 10-minute exploration turns in dungeons unless the table has a stronger local procedure.
Track light, ammo, rations, and salvage slots as real constraints.
Retreat is a valid action; extraction is usually the real victory condition.

d8	Procedure pressure this scene
1	Ancient facility cycles lockdown in 3 turns.
2	Salvage beacon attracts scavengers on next noise spike.
3	Ion dust corrupts one mapping assumption.
4	Ritual machine demands rare fuel or shuts down access.
5	Local faction patrol asks for permits, bribe, or blood.
6	Gravity shear changes movement rates this turn.
7	Relic AI offers help but records all promises.
8	Star-metal weather damages exposed gear each hour.