Developer breaks down the Nemesis system: WB patent and content costs are the real barriers
On October 23, @ccerrato147 posted a 12-tweet thread systematically breaking down how the Nemesis system in Middle-earth: Shadow of Mordor works and why so few games have successfully replicated it. Sources include Luke Stephens' 33-minute video, the enRAGE mod for Red Dead Redemption 2, Monolith's GDC 2018 talk, WB's 2021 patent, and BAFTA/GDCA 2015 award materials.
Confirmed
- The patent describes a gang hierarchy mechanic: killing a boss leaves a vacancy, promoting a successor changes their power or equipment, and a single roster can auto-generate the next conflict
- Consequences propagate through relationship chains: WB's patent describes indirectly updating affected characters via faction links, and enRAGE also records immediate reactions from relatives and friends to deaths; the author likens this to graph traversal—follow relationship links, then apply rules to each relationship
- The patent also includes a dialogue retrieval mechanism: stored event or dialogue IDs are matched to pre-recorded lines, with rules recombining character, situation, and response, so writers don't need to script every combination
Why it matters
- The author's core conclusion: the flexibility of Nemesis-style systems comes from reusable rules—change a threshold, a relationship, or a faction policy, and the same mechanics produce different stories
- The barriers aren't just algorithmic: voice, animation, quests, and persistent state must work together, and character failures must drive the plot; WB's patents behind Monolith's original complicate direct imitation, and content production and testing costs are equally high barriers
2026-10-23 ~ 2026-10-23 · 6 related posts
Primary sources
- How Nemesis-style systems scale: reusable rules, content costs, and why WB's patent matters — ccerrato147 ·
- 12-part thread breaks down Shadow of Mordor's Nemesis system: tweak rules, get new stories — ccerrato147 ·
- Why Nemesis-style systems are rare: coordination costs plus WB's patent — ccerrato147 ·
- Dialogue retrieval in WB's patent: scaling authored content via rule-based recombination — ccerrato147 · 2026-10-23
- Spreading NPC consequences like graph traversal along relationship links — ccerrato147 · 2026-10-23
- Nemesis hierarchy explained: a roster that machine-generates the next conflict — ccerrato147 · 2026-10-23
- [source] Why Nemesis-style systems are rare: coordination costs plus WB's patent — ccerrato147 · 2026-10-23
- [source] How Nemesis-style systems scale: reusable rules, content costs, and why WB's patent matters — ccerrato147 · 2026-10-23
- [source] 12-part thread breaks down Shadow of Mordor's Nemesis system: tweak rules, get new stories — ccerrato147 · 2026-10-23