
“COLLAPSE COMPANY” is a round-based roguelike action FPS for 1–4 players exploring shifting underground dungeons. Your goal is to activate the deep Particle Acceleration Reactor and escape before time runs out. Gather resources, upgrade gear, and push into riskier zones.
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About

“COLLAPSE COMPANY” is a co-op horror roguelite action FPS for 1–4 players, centered around repeated expeditions into underground dungeons.
Your primary objective is to activate the Particle Accelerator Reactor located at the deepest level of the dungeon and escape alive.
Each round sends players into a procedurally generated dungeon, where they must explore, search for scattered items, collect resources, and manage their inventory while progressing deeper underground.
Corridor layouts, room placements, item locations, and enemy spawns change every round, requiring players to adapt to new routes and unpredictable situations each time.
The dungeon is populated by multiple enemy types with distinct behaviors: some close in while out of sight, others ambush from walls or blind spots, and some remain hidden, waiting patiently for the right moment to strike. Enemy behavior dynamically reacts to player movement and positioning.
The environment itself is also a constant threat. Darkness, narrow corridors, confined spaces, environmental hazards, traps, and various gimmicks all add to the risk.
Resources and materials discovered during exploration can be brought back to the base, sold for currency, and used to prepare supplies or purchase equipment for future runs.
The game does not feature a fixed final stage or ending. Instead, it progresses in rounds.
After activating the Particle Accelerator Reactor, players must evacuate the dungeon under a strict time limit. The game continues until the team fails to escape or is completely wiped out. By challenging increasingly dangerous areas, players can earn greater rewards at higher risk.
A save system is implemented, allowing players to carry over their money and owned weapons into subsequent expeditions.

Procedurally generated underground dungeons
(Layouts and placements change every run)
Multiple enemy types
(Ambushers, gaze-triggered movement, trackers, and more)
Exploration and collection
(Search for items and manage them through an inventory system)
Environmental hazards
(Darkness, traps, mechanisms, sound-reactive elements, and confined spaces)
Round-based progression
(Collect resources, escape, and prepare for the next run)
Post-round upgrades
(Sell collected materials and acquire new equipment)
Endless structure with no final goal
(Rounds continue until the team fails)
Players continually adjust their loadout and inventory while delving into dangerous underground dungeons, collecting resources, and attempting to survive as long as possible.

Genres
Stats
All-time low is the lowest price we've recorded for this game since we started tracking it.
Languages: English, Japanese
Engagement
Hours played at review time, across 25 reviews with recorded playtime.
Reviews
REPOテイストのゲームで、いざやってみたが・・・物足りなさと面白味に欠けた感じではある UIが見ずらくて残弾数が分かりにくかったし、銃の銃声やリロードのモーションやADSモーションもこだわりを感じなかった・・・ あくまでも銃はおまけなんだなっと思った 後は、ステージ開始地点やホームベースに設置してある弾薬補給用の箱の仕様がまじでわかりにくい インタラクトキーを押して使うのかな?それとも物を入れるのかな?って思いきや、弾薬が完全に切れた際に近づくと補充・・・箱が自動で開閉する意味は? 正直・・・これで通常価格1000円は高いと感じた
ソロかなり楽しめたのでREPOみたいに知らない人とも遊べるようにしてほしいです。 気になることといえばマップが見ずらいのでもう少し地形や道などがわかるようにしてくれたらうれしいです
アーリーアクセスなのでボリュームが不足気味であったりADSがやや使いづらい等気になる点はあるものの、コイツのすごい所は個人開発であるというところ。音源等も記憶が正しければほぼ自作とのこと。まだまだ成長要素や新武器新マップの追加、環境の調整等の予定もあるとのことなので十分今後に期待の持てるゲームと言える。 関係ないがリボルバーのばかすか撃ちまくる感じがとても気に入ったのでリロードモーションや銃を眺められる機能の追加に密かに期待している。
粗削りではあるがマルチでそこそこ楽しめました。 以下改善点 ・死んだ際のデメリットがないためスリルには欠ける。 ・貯めたお金で銃を買えるが、たまに購入できない不具合がある。 ・敵の火力や体力にばらつきがありすぎる。 ・ダンジョンの構造が平坦すぎることが多い。
今後に期待のゲーム! 稚拙な文章だけどレビューを書かせてもらう。 とりあえず一周遊んでみた感じ特にストレスなく遊べ充実して楽しく遊ぶことができた! 程よい恐怖感と難易度で初見でもしっかりクリアまで遊べ、ステージ事にコンセプトが違っていてマンネリ化することなく攻略することができた。武器も敵も個性があって非常に良かった。 アーリーアクセスということでまだまだこれからもアイテムや敵を増やしていくらしいので今後も楽しく遊ばせてもらおうと思う。 一応問題点を挙げると、二週目の敵が強すぎたりなど色々あるけど順次アップデートで改善されると思う。 とにかくこれからに期待!!!
※期待を込めておすすめしておく、今はまだコンテンツが少なめなのでそれを前提としておきたい backrooms的な階層ごとに違う危険度のマップを探索してアイテムを持って帰るREPO+脱出シューター系 死んだり辞めても資金や武器は保存されるのでREPOやLCとは違うプレイ感に思える。 2時間いかないくらいで階層、敵などは網羅できて武器もすべて買えてしまうのでボリュームは課題、正直もっと死ぬことを前提として理不尽な敵とかヤバい罠を増やしていいと思った もっとたくさんの階層、敵が出てきたり武器、強化要素が追加されれば面白いゲームになりそうなポテンシャルはあるなと感じる(お金は余り気味なので高額な武器や強化要素が欲しい)
可能性の塊しかないゲーム 不気味な敵も多く非常に楽しんでプレイができた 個人的にはリロード・アイテム使用モーションが凝っていると没入感が増すので今後のアップデートに期待したい 不具合修正とコンテンツの充足は大変だと思うけど頑張ってほしい
Creative and a little rough around the edges. It's not bad but it's not something I'd go out of my way to recommend to someone. I can say it did unnerve me in a way game has not in a while.
マルチプレイでわちゃわちゃするのがとても楽しいです! これからのアプデ、とても楽しみにしてます
Oh. I forgot to leave a review. Haven't checked out the update yet (7/4/2026) but I'll leave a review based on my last playthrough about a month or so ago. The game is okay. It has a lot of potential but the main issue right now is that it's just very limited. All the maps and missions are too similar, some shop items are nearly useless, and you'll have the best weapon in about after an hour or so of playing. It wants to be Lethal Company with guns but it needs a LOT more time in the oven. I wouldn't necessarily recommend it right now unless you want to support the project and monitor its growth. Otherwise Wishlist it and come back later. I think it'll be a lot of fun once it's finished or at least closer to halfway finished.
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Trends
Modeled estimate over time, reconstructed from Steam's monthly review histogram.
Momentum
Pace estimated from the game's recent review growth (our daily snapshots) at its own sales-per-review ratio — a momentum signal, not booked sales.
Audience
Estimated from the language of this game's reviews — a proxy for where players are, not official Steam demographics.
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