Draft: NPC Strongholds

  • Dev Team

    Thank you for your questions!

    1. Those containers will not stay forever, they will disappear after some time similar to remainings of npc caravans (obviously, loot time will be longer than loot time of caravans). Plus, we are able to make those containers non-transferable by setting .storeCapacity to 0: players will still be able to .withdraw() but not store something there.
    2. We have no plans on changing that. Transferring energy is very profitable at short range (no remote mining could exist otherwise).
    3. In our current vision, these additional cores supposed to just disappear, but this is something yet to think about.
    4. No, controllers in a Stronghold room will be reserved by Invaders Core preventing players from capturing/reserving it.
    5. The same as previous

  • How would the reservation of rooms work? Would the stronghold magically reserve controllers in adjacent rooms? Or would claim creeps appear to do that?

    Not sure if I would like the magic way, since it seems to not allow locally defending my remotes. I have to attack the stronghold.

    Basically I would like Screeps complexity scale out using a small set of base mechanics (caravans do that well).

  • @o4kapuk ad 4: It's about additional cores in rooms reserved by player, not the stronghold room.

    In the original description: "it will attack controllers to remove player's reservation, then start to reserve the controller itself." So the reservation wasn't supposed to disappear immediately? What you just wrote contradicts that.

    According to original description, if core happens to appear when I have a reserver creep present in the room, I think I might have a few ticks to claim the controller after core's appearance. Not sure about attackController's timing and detailed effects. Will it allow me to claim in the first tick after core's appearance?

  • Dev Team

    @zyzyzyryxy This is correct, as attacking controller will take a time so theoretically you'll be able to claim the room, assuming you have GCL available. Thank you for pointing out to this case, details like this are yet to be worked on.

  • @artch @o4kapuk, thanks for the response and clarification. I saw something in slack that made me think spawn-at-edge-of-map invaders would no longer occur for source keeper rooms. Glad to hear that is incorrect!

  • @o4kapuk said in Draft: NPC Strongholds:

    No, controllers in a Stronghold room will be reserved by Invaders Core preventing players from capturing/reserving it.

    (it is actually my point 5)

    Will a player be able to attackController to remove reservation, then claimController? What will happen in that case?

  • Will invader defenders be allowed to go outside ramparts? Killing them regularly might be a significant source of boosts, especially with lvl5 core and 50-tick spawning time.

  • This so much better than what I though strongholds were going to be!

    Is that a container full of Power I see in the screenshot? 🤔 Will the reward be enough to use as an alternative to raiding power banks?

    towers and defenders will coordinate efforts to try various tactics

    Will this only be a feature of level 5 strongholds?

    I really like the idea of varying tactics. Evolving tactics would be even better. I I think it would be sad if we figure out how to hoodwink the AI. The devs (or community?) could add a new tactic every quarter or so.

    I've always thought it would be fun to run a community competition to build the best Invader AI, maybe we still can, but strongholds looks like another opportunity to try this out (later of course, get it working and stable before you let us mess with it).

  • The idea is interesting and from there can be created many other features.

    For example: usually all players room are invaded by a NPC invader who just spawn in one of the exits of the room, why not create a less menancing structure like this to create a "mini-base" to the invaders. Will be interesting to find and take down that base, obviously that will not happen on main world but will be very interesting to add it to a local server for those ones who want to improve their code or just have fun playing with friends in a PvE style.

    That's already happening but with full AI's from steam workshop. (And there's entire player's like base to fight, that's like a some sort of PvP against the AI, since those AI's was made by players. Don't get me wrong, those AI's some times can be more challenging than a siege to this stronghold.)

    If you go through that line, you'll find a lot of suggestions for the PvE environment to the game.

  • Dev Team


    Will a player be able to attackController to remove reservation

    The current plan is to make their reservation far stronger than any reasonable capacity of CLAIM parts, maybe like +200 reservation per tick or something (21*8=168 so 150 sounds not enough), the only way to fight this back is to remove core before.

    Will invader defenders be allowed to go outside ramparts?

    Depends on the level, lvl5 defenders should never leave ramparts, the only way to kill them is to remove rampart first.


    I really like the idea of varying tactics.

    Good news to you then, I'm going to throw in an alternative idea of NCP appearance policy.

  • Dev Team

    Here is another idea.

    What if we abandon the way when a Stronghold upgrading itself and just spawn random level Stronghold that will disappear after some time? This way we could much easier and faster design and implement various types of strongholds (bunker-like, walled, tower-specialized, defenders-specialized, balanced), plus it will be much easier to add new designs using various tactics in future. Plus, players will not be forced to wait for lvl5 Stronghold all the levels, it will just appear eventually.


  • @o4kapuk Yes, that idea sounds better. The wait time is way too long. And this way we will not see so many players just hunting level 0 cores.

  • Random strongholds is a great idea for all the reasons you say.

    I've been thinking about the idea of completely switching off invaders when you kill a stronghold. I'm not sure that I think it's a good idea because it will make the world less alive.

    If there are no invaders, and no nearby players throwing a spanner into the works, then the world will be completely dead apart from the occasional caravan that strolls part. An AI can run exactly like clock-work, with everything known up-front and nothing unpredictable to happen. The world will be barren. On the other hand, random invaders means that there is usually something happening in one of the rooms that you're exploiting.

    I think therefore that killing a stronghold should certainly reduce the frequency that invaders occur, but it shouldn't get rid of them completely. I propose that the effect of killing a stronghold should be equivalent to doubling or tripling the INVADERS_ENERGY_GOAL constant.

  • Dev Team

    @wtfrank So it seems you hope to defeat any Stronghold that appears in your sector immediately? It's not a realistic attitude, you will sometimes have strongholds (e.g. L5 or higher) that's too hard for all players in the sector to defeat in a reasonable time, so that invaders will be active during that period.

  • A lot of players were discussing in slack about keeping strongholds permanently wiped in their sector - or at least as much as possible. If someone is harvesting say 5 sourcekeeper rooms in a sector, there will be invaders spawning in an sk room approximately every 500 ticks. Certainly for lower level strongholds, it seems plausible to wipe them out pretty quickly and experience few (if any) invader spawns because of them.

    If there are some strongholds that are impossible or very hard to wipe out - then that seems great. I am up for difficult (and perhaps not even possible) challenges.

  • Dev Team

    @wtfrank There definitely will be stronghold variants that are almost impossible to crack. Also, even if you're lucky and you get multiple L1 strongholds in a row in your sector, they will respawn very quickly, so the invader-free period won't last long.


  • So if the strongholds become impossible, then all sectors will end up with a level 5 stronghold that no one dares to attack.

    IMO strongholds should take full damage from a nuke strike so that there's always a way to hard counter strongholds.

  • @crusher48 I guess that's when this kicks in: "After a long time of existence at the maximum level possible a Stronghold will disappear to reborn somewhere else."

  • More randomization within strongholds sounds better to me. As does "impossible" strongholds where it's just not worth the effort of taking them out. The original design of slowly leveling strongholds seemed a bit static and "solveable" while these new ideas are much more interesting as they require robust stronghold killing code, not just code that is known to beat a certain level.

    It also means it's not just about the reward of the loot. You can keep invaders down and go after the loot. That feels much better.

  • @o4kapuk so the Core will reserve an adjacent room regardless of having an exit there?

    I am concerned about special kinds of remote mines I am using: if a room has just one exit, you can use it as a remote from the exit room and don't need to build walls between the two, because there is no way any threat could appear in the enclosed room.

    Do you intend to make such rooms unsafe? As in: can they be magically reserved?