Dilemma 2025 Exercise Archive: Complete Record of the Yonsei IP4 Hybrid Threats Simulation

Complete primary-source archive of Dilemma 2025, formally the Yonsei IP4 Hybrid Threats Simulation 2025, a hybrid warfare simulation exercise conducted on a dedicated Discord server on 11 October 2025. The exercise was hosted by Yonsei University in Seoul with participating teams from universities in Australia, Japan, New Zealand and South Korea. Five fictional player countries were represented by nine player teams, each playing a different ministry, agency or task force within its government.

Play ran over four rounds, each divided into a briefing phase of ten minutes, a deliberation phase of twenty minutes, and a resolution phase of fifteen minutes. Each team could submit up to two overt and two covert actions per round. Countries were scored on five resources (deterrence capability, industrial capacity, political competence, social stability and territorial integrity) each running from four (safe) to one (unsafe).

The archive contains 238 files in four parts. exercise-design/ holds the organizers' design pack: the rules and guidelines, country profiles in open and restricted versions, the scenario outline, the style guide, the map of the fictional world, and the injects as prepared for each round. transcripts/ holds 18 channel transcripts covering 787 messages, including the shared channel, the nine national team channels, and the multilateral and bilateral negotiation channels. documents/ holds 64 scenario injects, moderator adjudications, round narratives and the final resource tally as distributed during play. assets/ holds the images, video and stylesheets the transcripts reference.

The archive is anonymized. Every account carries a code giving the team and role under which it played; display names, usernames, numeric identifiers and profile images have been removed, and document metadata cleared. Fictional characters named in scenario documents are the work of the exercise designers and are retained.