Mutant Epoch is another very fun d100 game, and one I keep coming back to when I want solo play that actually feels like play instead of homework. I mentioned it recently in the solo games and SBRPG discussions because it sits in the same family as the percentile systems I like—Rolemaster, Mythras, RuneQuest, BRP—but it leans hard into post-apocalyptic excavation fantasy in a way those games don't.
William McAusland’s Outland System is pure percentile work. You have eight traits (Endurance, Strength, Agility, Accuracy, Intelligence, Willpower, Perception, Appearance), rolled on d100 tables that give you a rough bell curve with room for the extreme. Combat is simple subtraction: your Strike Value minus the target’s Defense Value gives you the number you need or are under on a d100. Cover, movement, called shots, armor, and mutations all modify those numbers in straightforward ways. Damage comes off Endurance. A couple of solid hits put most ordinary people out of a fight. Guns, mutations, and chain weapons make it even faster. It isn't Rolemaster critical tables, but it is lethal enough that fights matter, and running or hiding is often the smart play.
What makes the game sing is the tables. So many d100 charts that each one is a rabbit hole. Mutations, implants, relics, encounters, loot, hazards, starting situations—every major decision point has a table, and the tables are designed so you can put the occasional 1% overpowered or completely broken result on them without wrecking the game. That is the real advantage of d100 design. You control the odds tightly enough that the wild stuff can exist. Dungeon Crawl Classics does the same thing. Mutant Epoch just applies it to a world of ruined cities, toxic wastelands, barter forts, and excavation teams digging up the relics of the Ancients.
Character creation is the best part, especially for solo. You do not know what you are going to get. Pure stock human, mutant, ghost mutant, cyborg, bestial human, clone, trans-human, bioreplica—and the Expansion Rules add plantoids, androids, nanoborgs, vat-brains, and more. Each major type has a complexity rating, so new players can stick to the simpler ones and veterans can dig into the multi-roll monsters. Starting equipment, caste, situation, and even whether you begin as a shackled farm worker with a wooden spear or a war-cyborg with a fusion weapon all come off the tables. It is Traveller-level random life, only deeper. There is almost no chance of self-insert. You deal with what you roll. That is refreshing after years of optimized pet characters.
Because rolling a new character is that much fun, the lethality becomes a feature instead of a bug. Dog Daze, the big solo adventure, is written for a first-rank character you are not particularly attached to. Expect more than half of them to die before the halfway point. You can roll up a handful, number them, and feed them into the module one after another until one survives or you get tired of the bloodbath. The same approach works for any sandbox dig. Excavator Monthly even had articles on solo play. The One Day Digs and the shorter adventures are easy to drop in. The tables do a lot of the heavy lifting for emergent play, so you are not constantly inventing encounters from nothing.
The art is a big part of the experience. McAusland illustrates the books himself, and the style is dense, freakish, and consistent. The Hub Rules are already packed. The Expansion Rules push it further with hundreds more mutations, implants, relics, and character options. A free Quick Start Rules PDF is available if you want to try the system before buying anything. The Society of Excavators membership comes with the Hub Rules and gives access to extra maps and handouts.
It still has classic Gamma World energy- mutants, ruins, relics, and the slow attempt to claw some kind of civilization back- but the d100 tables and random character generation give it more staying power for solo play than most other post-apoc games I have tried. You can play a long series of short, doomed excavators and enjoy the process of making each one. Or you can get lucky, survive a few digs, and start accumulating the weird mutations and ancient tech that turn a nobody into something dangerous. Either way, the dice are doing real work.
Highly recommended if you like percentile systems and do not mind characters dying. The Quick Start is free. Dog Daze is there when you want a proper solo module. The rest of the line is waiting if the rabbit holes pull you in.































