Fort of the Fifth Peace

Hold a fort at the meeting point of remembered law and uncertain realms. Build living defenses, guide a clan through escalating waves, and decide which oaths deserve to shape the stronghold. Choose account-linked Online Play or account-free Offline Play at launch.

Version 0.3.10 pre-alpha

Download the Windows preview

This is the current playable development build for Windows 10 or Windows 11 on x64 hardware. Extract the complete ZIP to a writable folder and run TirIdirFortLauncher.exe. Every launch asks for a play mode: Offline Play needs no account and never shares records; Online Play completes a secure update check before validating a linked Tír Idir account. Version 0.3.10 turns Mist, roots, thorns, tides, fire, and black ice into visible battlefield fields, then adds four controlled reactions when selected fields overlap.

Download Windows Preview (605.4 MiB) Update Notes

This preview is not code-signed, so Microsoft Defender SmartScreen may ask for confirmation. Verify the ZIP's SHA-256, extract every file, and launch only TirIdirFortLauncher.exe.

Build: 0.3.10 preview · build bee6797
Platform: Windows 10/11 x64
Package: Unsigned launcher ZIP · 634,758,098 bytes
SHA-256: 4c9e0cbbbed925178c812dea144391b0a9b0b7fb139b4f7752454caa07d50fce

Fort of the Fifth Peace with enemies encircling the central fort as the player holds the threshold — A standard defense wave closing around the fort, with abilities, damage meters, and the run's current oath effects visible.

Fort of the Fifth Peace gameplay during a Red-Anvil Threshold Realm Shift — A Red-Anvil Threshold Realm Shift transforming the battlefield during a Siocáin defense.

Public preview in active development

The downloadable build is playable, but it is not a finished release. Systems, balance, art, audio, performance, and campaign-facing structure remain subject to change.

Verified patch updates are live

Version 0.3.10 keeps local checkpoints and the visible, verified update flow while adding ground-first control and hazard fields. Launcher 1.3.1 continues to report network, reused, and installed sizes separately while unchanged game data is recovered locally.

Normal launcher starts and Offline Play remain network-free. An update check begins only after you choose Online Play.

A fort that carries choices

Walls, outworks, defenders, fort abilities, and damage types interact with clan progression rather than acting as generic tower slots.

Oaths shape each run

Major and Mythic Oaths, talents, champions, conversions, and status interactions create builds with a recognizable clan identity.

Realms cross the threshold

Realm Shifts bring bespoke incursions from places such as the Blackthorn Grove, the Drowned Sea Road, and the Red-Anvil Threshold.

Defense without simple villains

Fomorian-tainted beings and rival clans are not reduced to faceless evil. The fort's choices still answer to memory, mercy, and responsibility.

Public community records

Keepers by clan

Compare Best Wave, Largest Critical Hit, and Realm Shifts Completed across every clan, or narrow the ledger to one clan. Records are shared for friendly comparison and remain completely separate from Trials ELO.

Clan Version

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Best Wave

Rank	Keeper	Clan	Version	Wave	Largest Crit	Run
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Largest Critical Hit

Rank	Keeper	Clan	Version	Critical	Source	Wave
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Realm Shifts Completed

Rank	Keeper	Clan	Version	Shifts	Wave	Run
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Open filtered Fort records

While development continues

Play a finished tactical slice of the setting

Trials of the Fifth Peace is available now in the browser and shares the same clans, damage language, Ogham objectives, and Fifth Peace themes.

Play Trials Explore Trials