Documented for this version
Which controls does this version use?
Actions
Keyboard | Use the stylus and touch screen to inspect scenes, select evidence, and navigate case files. Use the D-pad and face buttons for dialogue, menus, and confirmation. Verify the loaded Arcade Systems build instructions when the public sources do not provide a complete control table. |
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Control notes
The loaded Arcade Systems mapping takes priority over generic labels.
How it plays
How does Otoshi Deka - Keiji-san, Watashi ga Yarimashita (Japan) play?
Move through the case scenes, inspect objects, interview witnesses, collect evidence, and select the deduction or response that moves the investigation forward. The DS interface supports touch-based examination and case management while the story presents the investigation through dialogue and event scenes.
Plan your run
What is the best way to play Otoshi Deka - Keiji-san, Watashi ga Yarimashita (Japan)?
Keep a timeline of the case, revisit evidence when a statement changes, and save before a confrontation or accusation. Do not treat the first plausible suspect as the solution; compare the physical evidence with the witness timeline before selecting a deduction.





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