## Description:
### SAM Overwhelming (`NationNukeBehavior.ts`)
On Impossible difficulty, nations can now destroy enemy SAMs by
overwhelming them with coordinated atom bomb salvos. When no good nuke
target is found (all trajectories intercepted by SAMs), the nations
will:
- Identify the easiest enemy SAM to destroy (lowest level first)
- Calculate the total interception capacity of all covering SAMs and
send enough bombs to overwhelm them (+1 extra per 5 needed to account
for enemy building more SAMs during flight)
- Plan launches in NukeExecution's Manhattan-distance silo order,
tracking which silos have interceptable trajectories (wasted bombs)
- Use a sliding window over parabolic flight times to find the best
cluster of bombs that can arrive within half the SAM cooldown window
- Compute per-bomb wait ticks to synchronize arrivals from silos at
different distances
- Skip launching if a salvo is already in flight
- Upgrade the best SAM-protected silo when silo capacity is
insufficient; wait and save gold when only gold is lacking
https://github.com/user-attachments/assets/14fa592f-2902-4604-8e37-1eba2b2f0b85
### 2-Player Endgame Handling (`NationNukeBehavior.ts`)
- On Hard/Impossible with only 2 players remaining,
`findBestNukeTarget()` directly targets the other player (bypasses all
priority logic)
- `getPerceivedNukeCost()` returns actual cost (no MIRV saving
inflation) when only 2 players are left
### SAM Build Rate (`NationStructureBehavior.ts`)
- Reduced SAM perceived cost increase per owned from 1.0 to 0.5, so
nations build more SAMs
### Island Attack Variety (`AiAttackBehavior.ts`)
- `findNearestIslandEnemy()` now collects up to 2 reachable candidates
and has a 33% chance to pick the second-nearest, adding variety to boat
attack targeting
## Please complete the following:
- [X] I have added screenshots for all UI updates
- [X] I process any text displayed to the user through translateText()
and I've added it to the en.json file
- [X] I have added relevant tests to the test directory
- [X] I confirm I have thoroughly tested these changes and take full
responsibility for any bugs introduced
## Please put your Discord username so you can be contacted if a bug or
regression is found:
FloPinguin
## Description:
PR 5/x in effort to break up PR
https://github.com/openfrontio/OpenFrontIO/pull/3220. Follows on already
merged https://github.com/openfrontio/OpenFrontIO/pull/3236.
Please see if these can be merged for v30.
**NationStructureBehavior**:
- maybeSpawnStructure: cache this.game to be used twice.
- maybeSpawnStructure: instead of hardcoded ruling out Defense Post for
upgrade check, check dynamically if type is upgradable. That way if
defense posts ever do become upgradable, we don't run into a bug right
away.
- maybeUpgradeStructure: removed canUpgradeUnit check. Since it already
checked this right before in findBestStructureToUpgrade, so only
upgradable units are returned. And canUpgradeUnit is also checked right
after in UpgradeStructureExecution. So we're going from 3 times to 2
times canUpgradeUnit, small perf win too.
- findBestStructureToUpgrade: cache this.game to be used thrice.
- shouldBuildStructure: cache this.game.config() to be used twice.
- getTotalStructureDensity: this.player.units can handle an array of
unit types to count. Input StructureTypes like this so we don't need a
loop and count, and only have to get an array length once.
getTotalStructureDensity needs to ignore unit levels so we can't make
use of other pre-defined functions in PlayerImpl (which were created to
avoid array length calls), but at least this saves a few.
## Please complete the following:
- [x] I have added screenshots for all UI updates
- [x] I process any text displayed to the user through translateText()
and I've added it to the en.json file
- [x] I have added relevant tests to the test directory
- [x] I confirm I have thoroughly tested these changes and take full
responsibility for any bugs introduced
## Please put your Discord username so you can be contacted if a bug or
regression is found:
tryout33
Resolves#2997
## Description:
### New stuff
- Nations can upgrade structures now. They do it if they have too many
structures compared to their territory size
- They prefer to upgrade stuff thats protected by SAMs (based on
difficulty)
- Updated the build order, it also depends a bit on the difficulty now
(easy nations build less SAMs)
- Nations can handle extreme amounts of gold now. 500M starting gold? no
problem. Previously they only built cities
- They stop saving up for MIRV if they can afford it (in some old Enzo
"impossible difficulty experiment" videos you could see nations with
like 300M gold...)
- The save-up-target changes when bombs / hydros / MIRVs are disabled
- Added many checks for disabled units. For example: Don't build SAMs
when missile silos are disabled, focus on factories when ports are
disabled
- Updated the `structureSpawnTileValue` method, SAM-placement depends a
bit on the difficulty now
### Refactor
- Moved all structure related nation code into
`NationStructureBehavior.ts`
- Split up the good old `structureSpawnTileValue` method to make it more
readable
- Cleaned up NationExecution a bit
### A screenshot
<img width="1681" height="755" alt="Screenshot 2026-02-08 001108"
src="https://github.com/user-attachments/assets/c9b3df01-41ca-4c68-b450-b20e7d7d910a"
/>
## Please complete the following:
- [X] I have added screenshots for all UI updates
- [X] I process any text displayed to the user through translateText()
and I've added it to the en.json file
- [X] I have added relevant tests to the test directory
- [X] I confirm I have thoroughly tested these changes and take full
responsibility for any bugs introduced
## Please put your Discord username so you can be contacted if a bug or
regression is found:
FloPinguin
FloPinguin