A 2D dark fantasy action roguelike where you battle endless hordes while managing your "Corruption Level." Play as Iris, a fallen knight seeking revenge. Master diverse weapons, execute perfect dodges, and sacrifice your sanity for devastating magic. Will you succumb to the pleasure?
最低推奨OSWindows 10 64-bitWindows 10 / Windows 11 64-bitプロセッサーIntel Core i3 / AMD Ryzen 3 (2.0 GHz or faster)Intel Core i5 / AMD Ryzen 5 (3.0 GHz or faster)グラフィックDirectX 11 compatible graphics card with 1GB VRAM or moreNVIDIA GeForce GTX 1050 Ti / AMD Radeon RX 570 or equivalent (2GB VRAM or more)メモリー4 GB RAM8 MB RAMストレージ3 GB available space同じ
Boundary of Reason -Iris-について
Iris, a former female knight stripped of everything, turns to cursed magic that erodes her mind to exact revenge on the nobles.
Facing bloodthirsty bandits and lust-driven monsters, her only guide is the emotionless, mechanical voice of the System Monolith.
Follow its cold navigation, cross the boundaries of reason, and carve a blood-soaked path of vengeance.
The "Corruption Level" builds through the toll of magic and enemy attacks.
It reshapes not only Iris's abilities but her body, mind, and very fate.
As it rises, her combat animations, her posture at base, and even the system messages from the Monolith transform seamlessly.
Most importantly, key story dialogues and taunts from bosses change based on her current state.
Will you uphold the pride of a noble knight, or surrender to your twisting desires?
Every facet of her transformation is dictated by your choices.
Discover 11 distinct weapons, each with its own unique properties.
Defeat enemies and upgrade your arsenal in battle to unlock up to three stages of "Awakening Skills."
Will you choose wide-range area attacks to ravage the battlefield, or concentrated, devastating strikes? Craft the ultimate build with powerful synergies and annihilate the endless swarms of enemies filling the screen!
The Tentacle Shrine, Slime Shrine, Succubus Shrine... The magic obtained from these is powerful, but every cast relentlessly spikes your Corruption Level.
Furthermore, scattered across the battlefield are Cursed Relics, offering tremendous buffs in exchange for crippling curses like reduced max HP or continuous damage.
Sacrifice your life force and your sanity to claim devastating power.
After surviving fierce battles, return to the base where your emotionless partner, the System Monolith, awaits.
Offer the Souls gathered on the battlefield to permanently enhance your stats and unlock new weapons.
Heal your wounds, confront your increasingly twisted desires, gear up, and march back into the deadly fray.
よくある質問
Steamストア(JP)でのBoundary of Reason -Iris-の価格は¥ 135です。2026年9月22日以降に当サイトが記録した最安値は¥ 135です。Steamではこのゲームに14地域で個別の価格が設定されています。地域別の価格は上記のとおりです。
Boundary of Reason -Iris-は2026年6月30日にGuusuyaからリリースされました(3か月前にリリース)。
最低:Windows 10 64-bit, Intel Core i3 / AMD Ryzen 3 (2.0 GHz or faster), DirectX 11 compatible graphics card with 1GB VRAM or more, 4 GB RAM。上のシステム要件カードでは、各プラットフォームの最低スペックと推奨スペックを比較できます。
Steamでは、Boundary of Reason -Iris-に必要な空き容量は3 GBとされています。
4件のSteamレビューのうち100.0%が好評で、Steamでの評価は「4 user reviews」です。
はい。Boundary of Reason -Iris-はインターフェースと字幕が日本語に対応していますが、日本語のフル音声は収録されていません。Steamには合計3言語が掲載されており、フル音声に対応した言語はありません。
いいえ。Steamでは、Boundary of Reason -Iris-はシングルプレイヤーゲームとして記載されています。
SteamStatisticsのBoundary of Reason -Iris-のSteamチャートでは、リアルタイムのプレイヤー数と24時間・7日間・30日間の推移グラフを確認できます。データは少なくとも10分ごとに更新されます。
Steamでは、Boundary of Reason -Iris-はWindowsに対応しています。コントローラー対応の記載なし。
Boundary of Reason -Iris-の年齢レーティングはDEJUS 14、IGRS 18です。