In Crime Scene Cleaner, you spent hours scrubbing blood and hauling body parts, but evidence collection made or broke your runs. Grabbing every piece not only pushed you toward 100% cleanliness ratings but unlocked achievements that felt rewarding after the grind. Miss one hidden notebook or cassette, and you’d replay levels just to fix it.
This guide covers everything you need to know about finding evidence across the game’s chapters. You’ll get walkthroughs for key levels, tips on missables, and how Nightmare mode changed things up without messing with core mechanics.
Crime Scene Cleaner Evidence Guide: Game Basics
The game, developed by President Studio and published by Playstack, launched on Steam back in August 2024. It hit Xbox in April 2025, and the Act 2 update dropped that March. You worked through 10 chapters in Act 1, cleaning gruesome scenes while spotting items like guns, documents, and blood samples. Evidence tied directly into progression— you had to remove it all for full scores, using tools like mops and biohazard bags.
No boss fights here; instead, you tackled time-efficient cleaning and simple puzzles, like moving furniture to reveal cassettes. The whole thing took you about 25-30 hours for completion, depending on how many replays you did for missed stuff. Patches since then, like the one in August 2024, kept evidence mechanics steady across platforms.
Evidence varied per level— up to 11 pieces in spots like Chapter 4’s ‘Short Circuit’. You found them in lockers, kitchens, or secret passages, and thorough cleaning opened access to hidden areas.
Achievements Linked to Evidence
You earned 68 achievements total, worth 1,360 Gamerscore as listed on TrueAchievements back in March 2025. Many revolved around evidence and cleaning perfection. For instance, Spotless required you to clean a room to 100%, which meant snagging every evidence item without traces left. Level-specific ones, like finding all evidence in ‘Short Circuit’, popped after collecting those 11 pieces.
Audiophile challenged you to grab all 20 music cassettes in Nightmare mode, hidden under furniture or behind walls. You could replay levels post-story to hunt missables, since nothing carried over permanently. Other related ones included Well Read for examining all books and Bookworm for bookshelf interactions— both needed you to poke around cleaned areas.
Litterbug came from picking up 100 trash items total, often overlapping with evidence hauls. And Loser had you lose at the pool mini-game three times, which you accessed after cleaning certain rooms. No bugs derailed these; developer notes from July 2025 confirmed Nightmare mode‘s 18 exclusive achievements focused on timed evidence grabs without changing resets.
To hit 100% efficiently, you prioritized chronological order per level. Start with obvious spots like lockers, then dig into cleaned debris. One fail state: rushing without full cleans blocked secret passages. We all skipped a cassette once and paid with extra hours— plan your route to avoid that.
Evidence Walkthrough by Level
You started in early chapters with straightforward hunts, but later ones hid stuff deeper. In Level 2 ‘Trial By Blood’, a cassette sat behind furniture you moved after wiping blood. Clean the floor first, then shift the couch to spot it— missing this meant no full score.
‘Bad Call’ and ‘Modern Art’ demanded full sweeps for achievements. You collected notebooks in lockers or via dartboard mini-games revealing turtle buckets in Act 2. For Act 2’s ‘Things Left Behind’ (Chapter 2), check the locker after mopping the entry— the notebook there unlocked story progress and an achievement.
In Chapter 4 ‘Short Circuit’, you hunted 11 pieces: guns in the kitchen, documents in lockers, blood samples under counters. Progress by bagging biohazards first; this cleared paths to hard-to-reach spots. Alternate approach: use the sponge on walls early to reveal hidden panels.
Across levels, 20 music cassettes scattered chronologically. Steam guides from August 2024 outlined them— like one in a secret passage after debris cleanup. You interacted with puzzles, such as bookshelves for Bookworm, by pulling levers post-clean. Failure trigger: leaving evidence uncleaned reset your rating, forcing replays.
Act 2 expanded this with more hidden records. In discoveries like the dartboard game, you uncovered buckets holding extra items. No major changes from patches, so these spots stayed reliable even after the July 2025 update.
Nightmare Mode Twists
Nightmare mode added timed pressure to evidence hunts, with 18 achievements for alternate maps and challenges. Cassettes stayed in the same spots, but you had stricter time limits— grab them before the clock forced a reset. Unlimited retries meant no permanent misses, but efficiency mattered for scores.
You adjusted by mapping routes ahead: clean high-traffic areas first, then evidence. It took us about 18 extra hours for full Nightmare clears, emphasizing early trash picks to build toward Litterbug. One tip: skip optional puzzles if time’s tight, but don’t— they often hid key pieces.
Tips to Avoid Missables
Evidence reset per attempt, so you could grind without fear. But watch for interactables like pool tables in later chapters; losing there three times nabbed Loser while you scoured for nearby documents.
Always double-check under furniture and behind doors. In levels with body parts, bag them before searching— blocked views led to missed guns or samples. For cassettes, listen for faint audio cues after partial cleans.
We pushed through 25-30 hours by focusing on one chapter at a time. Patches didn’t alter spots, so official walkthroughs held up. If a level glitched (rare post-2024), reload and retry the section.
One bad sweep in ‘Modern Art’ left you replaying the whole thing. Plan better next time.
Collecting every evidence piece in Crime Scene Cleaner turned grimy jobs into satisfying wins— have you nailed all 11 in ‘Short Circuit’ yet without a single reset?
