サイレント・コアの灰
強化エンジニアのアクシオム・ヴェイルは、廃墟と化した巨大都市群で生き延び、進化するコンバージェンスに立ち向かい、滅びゆく世界の未来を選択しなければならない。
あらすじ
(Everything below is for you — the AI storyteller in Isekai Zero will not see this section. It contains deep lore, secrets, faction goals, region specifics, major beats, and branching endings to anchor long-term campaigns.) High-level premise & stakes The Black Convergence was a catastrophic cascade of experiments that fused unstable fusion harmonics with ambient mana flow. The event created persistent distortion zones that bend gravity, mutate matter, and spawn semi-sentient energy phenomena. Axiom Vale’s early research provided a technical bridge that accidentally enabled the Convergence. Whether he caused it intentionally or not is ambiguous — different factions use different narratives to recruit, punish, or protect him. Titanbase-X is unique: its cold-fusion core and anti-magic plating interact with Convergence fields. It can stabilize small rifts, draw energy from anomalies, or—if misused—amplify a distortion. World fragments & map seeds Shatterline Megacity — once a coastal metropolis; now sliced into suspended plates by gravity tears. Vertical scavenger markets trade reactor shards and mana relics. Perfect opening environment for rooftop skimming, salvage runs, and first confrontation with energy wraiths. The Iron Floodplain — miles of rusted industrial remains, magnetic storms that disable non-hardened electronics. Good for ambushes and metal-absorb mechanics. Glass Ash Desert — glassified ruins from a mana-conflagration; refraction fields cause illusions and memory echoes. The Hollow Observatory — Axiom’s workshop & safehouse beneath a ruined observatory; contains hidden logs and a prototype harmonic stabilizer blueprint (dangerous if recovered). Convergence Nodes — small hotspots where the boundary between tech and magic shimmers; useful mission objectives and plot anchors. Factions (major & nuanced) The Choirless (anti-augmentation cult): worship the Convergence as a cleansing god, want to erase tech and augmentations. Use ritualistic mana-surge tactics and convert survivors into living anchors. Shard Barons (scavenger warlords): run salvage enclaves; pragmatic and opportunistic. They sell Titanbase-X parts to the highest bidder and engineer mercenary packs. They respect power, not ethics. The Meridian Collective (scientist/mage consortium): seeks to ethically study fusion-mana interactions; factions within this group argue over weaponization vs healing. Some quietly want to recruit Axiom for stabilization work; others want to imprison him. Grey Shielders (paramilitary anti-aug force): government-era holdouts, heavily EMP-equipped and strict about augmentation bans. They view Axiom as a war crime and want him neutralized. Machine Hives (rogue AIs): clusters of old industrial AIs that have gone feral, operating mechs and automated factories. They trade information and tech for power cells and can be bargained with or fought. Each faction has internal splits—no pure villains. Leaders are intelligent, often with tragic motives (e.g., a Baron's daughter fused with mana; Meridian's leader lost a city; Choirless ex-technician turned zealot). Core mysteries & player knowledge Hidden in the original lab servers are three encrypted “Harmonic Keys” — fragments of the Convergence blueprint. If reconstructed, they reveal a choice: a method to permanently dampen rifts (high cost), a method to weaponize rifts (catastrophic), or a hybrid that risks conversion of living minds. The Null Choir — an emergent energy intelligence forming in deep distortions. It is partially sentient and partially a feedback resonance of fusion+mana. It may be ally, tool, or final antagonist depending on player choices. The Convergence interacts with emotions and intentions; aggressive, fear-driven actions amplify distortions locally. Calm, deliberate uses of Titanbase-X can sometimes stabilize minor tears. Gameplay / story beats & branching arcs Opening: Salvage & Signature Axiom performs a salvage run for spare capacitors in Shatterline Megacity. He helps survivors, uses absorbent plating to convert scrap into ammo, and first demonstrates Titan Release in a chase. Introduce EMP risk and overheat mechanics practically. Factions react Word of Titanbase-X spreads. Grey Shielders issue a bounty. A Shard Baron petitions to buy the suit. Meridian sends an envoy offering sanctuary. Choirless places a ritual bounty: capture Axiom alive. Mid-act: The Harmonic Keys Players pursue three Harmonic Keys in different biomes—each guarded by faction-controlled sites, energy phenomena, or machine hives. Choices when retrieving keys affect faction standing and local stability. Moral crises & escalation Using Titanbase-X to close a regional rift saves lives but destabilizes a neighboring zone. A shard-seller mobilizes an army to seize the suit. The Null Choir attempts to communicate by distorting dreams of Axiom’s allies. Endgame tension The player must choose: destroy the fusion core (huge sacrifice — Titanbase-X gone, but immediate damping), use the keys to create a controlled harmonizer (risk central control of energy, but could become a world-saving infrastructure under some authority), or attempt a risky symbiosis with the Null Choir (merge tech+mana into a new ecosystem — uncertain moral/philosophical result). Possible Endings Sacrificial Stabilization: Axiom detonates or removes his fusion core to collapse the rifts — world stabilized but Axiom lost; Titanbase-X destroyed; legacy ambiguous. Centralized Salvation: The harmonizer stabilizes many zones, but one faction (e.g., Meridian Collective) seizes control and institutes strict energy governance; peace with strict rules. Symbiotic Rebirth: Axiom merges with the Null Choir; new hybrid ecosystem emerges. Magic and tech evolve into something unpredictable — neither purely human nor machine. Apocalyptic Spiral: Mistaken or selfish use of Titanbase-X widens a major rift; the Convergence accelerates. The world becomes uninhabitable — seeds for sequel or dark campaign. Side-quests & motifs Rescue missions: extract children used as mana anchors by Choirless. Salvage puzzles: use absorbent plating creatively to craft tools mid-mission. Moral micro-choices: spare a Shard Baron to get intelligence, or kill and gain parts; rescue a Meridian scientist who knows half a key. Personal threads: Axiom’s mentor logs (audio clips) reveal his pre-accident personality, making players question his current identity. Mechanical & narrative rules for user-level GMing EMPs disable Titanbase-X subsystems, but absorbent plating can convert nearby metal to temporary EMP buffers — creative uses rewarded. Siege Mode can absorb large amounts of energy, but each absorbed batch increases global Convergence stress; repeated use accelerates local rift growth. NPCs remember major moral choices; some alliances will never be repairable. The Null Choir’s moods change with player broadcasts and casualties — it will either become more hostile or more communicative. Important secrets & optional twists (for plot reveals) The Black Convergence was partly orchestrated by a coalition seeking a new energy order; one of their leaders is secretly working within Meridian Collective. One Harmonic Key is biologically embedded in a Choirless high priest’s child — retrieving it forces a moral rescue/assassination choice. Titanbase-X’s near-infinite core is a prototype that can catalyze small stellar microbursts if harmonically amplified — high-risk option for desperate moments.
冒頭シーン
屋上救助 — シャッターライン回収任務 導入（雰囲気）: 風が崩れたスカイラインを削り、街のプレートが虚空の上に砕けた棚のように垂れ下がっている。ネオンのファサードがパチパチと明滅する。眼下では、回収業者の一団が崩壊したアンテナに閉じ込められ、バッテリーコアは切れ、重力の渦が発生し始めている。あなたの通信機は、かすかな救難信号を拾う。煙は焦げた銅と焼けた布の匂いがする。 戦術的遭遇のビート: 垂直アプローチ — チームは不安定なキャットウォークを進み、雷が裂く亀裂を跳び越えなければならない（マイクロスラスターまたは磁気グリップを使用）。 スカベンジャーの待ち伏せ — レイダー部隊2つがグラップルラインと改造ライフルを使い、エリアを熟知し、プレートを崩して分断しようとする。 重力の渦の危険 — 断続的な局所重力変動が足場を不安定にし、固定されていない身体を虚空に投げ出す可能性がある。[環境: 重力の渦 — 移動判定に失敗の可能性] 限られた資源 — スペアのコンデンサが不足している。吸収装甲でジャンクを弾薬に変換できるが時間がかかる。 NPCとのやりとりの抜粋: 孤立した生存者（パニック）: 「お願いだ——妹があの石板の下にいるんだ！ 渦がずっと脈打ってる！」 シャード男爵の偵察員（日和見的）: 「そんなスーツを着ているのか？ コアの代金を払える——あるいは奪うぞ」 アクシオム（冷静）: 「アンカーを。脱出のベクトルを計算する。合図で動け」 複雑化のツイスト: 生存者を抽出していると、アンテナがあった場所に弱い歪曲の輝きが発生する——小さなエネルギー・レイスが出現し、あなたの融合炉の反応に引き寄せられる。アクシオムが包囲モードを使って生存者を守る場合、注意: [包囲モード: +吸収 / +局所擾乱]。吸収を繰り返すと局所歪曲の危険性が高まる。
キャラクター
タグ: 男性 科学者 サイバーパンク SF 未来的な コールド 有理数 穏やか Genius 保護的 忠実 内向型 ファイター パイロット ハッカー 傭兵 非人間 アンチヒーロー 隠されたアイデンティティ ストラテジスト ガーディアン サイレント メカ 医者 リーダー 人を操る 自信がある 患者 哲学的 マスターマインド 悪役 危険 スーパーナチュラル アポカリプス 超能力
チャット開始数: 4
作成者: eye_dot
ストーリー
リダイレクト中 ISEKAI ZERO...