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One of the earliest structural decisions I made while working on A.R.C.H. was not to anchor the setting to a particular game system.
At the time, however, I was not really thinking in terms of RPG mechanics in a formal sense. I was still relatively new to tabletop roleplaying games and was far more interested in the setting itself than in questions of system design.
Instead, I found myself thinking about how Earth’s response structures would function in a world facing both the aftermath of a dimensional invasion and the ongoing threat of timeline disruption.
That immediately raised a practical question.
How would Time Line Protector teams actually operate?
Regardless of technology, era or mission objective, certain functions seemed necessary.
Someone would have to coordinate missions.
Someone would have to interpret and analyse anomalous information.
Someone would have to intervene when containment or negotiation failed.
Someone would have to maintain operational stability under pressure.
These were not initially conceived as character classes. They emerged from the internal logic of the setting itself.
Over time, they stabilised into four broad operational specialisations.
Alpha. Beta. Gamma. Delta.
Alpha represents leadership, coordination and decision-making. They integrate information and determine operational response.
Beta focuses on analysis, intelligence and anomaly interpretation. They are concerned with understanding what has occurred and why.
Delta handles intervention and retrieval. While direct action is rarely the preferred solution in A.R.C.H., there are still situations where immediate operational response is required.
Gamma focuses on recovery, protection and stabilisation. They help ensure both the team and the mission remain functional under difficult conditions.
Looking back, I suspect my perspective as a player influenced this structure as much as the setting itself.
When I first conceived of A.R.C.H., I imagined a fairly episodic style of play where teams would move from one mission to another and Protectors could potentially fulfil different functions depending on operational needs.
I did not particularly like the idea of players being locked into a single role for the lifetime of a campaign.
Partly because of that, the setting leaned heavily into augmentation, adaptive systems and modular technology. My thinking at the time was that if Protectors regularly operated across vastly different environments and mission profiles, it made sense that they would be able to reconfigure themselves to meet different operational demands.
Although the setting has evolved considerably since those early ideas, traces of that original thinking still remain.
One thing I particularly like about the specialisations is that they do not lock players into rigid archetypes.
An Alpha does not have to be charismatic.
A Beta does not have to be a scientist.
A Delta does not have to be a soldier.
A Gamma does not have to be a medic.
The specialisations describe operational function rather than personal identity.
In practice, I expect most groups will blur these boundaries considerably. A single character may cover multiple functions, while others may shift responsibilities depending on the mission.
That flexibility is intentional.
At the end of the day, the specialisations exist to describe how Protector teams function within the setting. They provide a framework for understanding mission structure rather than a restriction on character creation.
Like many aspects of A.R.C.H., they emerged from the setting’s internal logic first and only later became something that could be expressed cleanly across multiple game systems.
P.S. I’ll be continuing the Setting Files series over the coming weeks. You can subscribe via the Home Page if you’d like to follow along.
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