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  • How to Use a MrAntiFun Game Trainer

    Compatibility: Trainers on this forum target the single-player mode of PC games on the exact version listed in each thread. They do not bypass online anti-cheat systems (Easy Anti-Cheat, BattlEye, VAC) and should never be used in multiplayer or competitive modes.

    Installation (4 steps):

    1. Use the download link in the thread. Check what you receive before running it.
    2. Scan the file yourself before running it. Trainers edit game memory, so antivirus tools often flag them heuristically.
    3. Launch the target game first, reach the main menu, then start the trainer (Run as administrator).
    4. Use the assigned function keys (usually F1–F12) to toggle options: infinite health, stamina, resources, etc.

    If a trainer doesn't activate: confirm the game version matches the "Game Version" header; update Visual C++ Redistributables; and check that your AV hasn't quarantined the executable. Discussion and fixes happen in Trainer Support.

    All tools here are community-contributed, tested, and updated per thread.

Kumitantei: Old-School Slaughter Trainer Fling

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MrAntiFun

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Game Name: Kumitantei: Old-School Slaughter
Game Version: 29

Kumitantei: Old-School Slaughter is an adventure game developed by Mango Factory, released in 2026. The trainer below is for single-player use only.​

About Kumitantei: Old-School Slaughter​

Kill each other...for science! The class of '89 is trapped in an elite school killing game. Investigate, solve, and expose your classmates in Kumitantei™: Old-School Slaughter, an episodic murder-mystery ADV card-battler inspired by retro anime.

Kumitantei: Old-School Slaughter – Game Information​

  • Developer: Mango Factory
  • Publisher: Akupara Games
  • Genre: Adventure, Indie, RPG
  • Release Date: 23 Apr, 2026
  • Platform: Windows
  • Metacritic Score: 79/100
  • Steam Achievements: 11
  • Languages: English

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Attachments

  • Kumitantei: Old-School Slaughter Trainer Fling Trainer Setup.exe
    24 MB
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