It varies depending on whether you are in the investigation or trial, and also the phase of the trial. These are the controls I found, although there may be a few that I missed.
Some of the controls are tied to the plot, so I put them in a section called “Chapter-Specific Controls” at the very end of this list. If you haven’t played the game yet, then don’t read this section.
Investigation (Walking Around)
- WASD - move around
- Left Shift/Mouse scroll - sprint
- Right Click/Enter - open map overlay
- Left Click - inspect
- Q/E - look around
- F1 - open Monopad
- Mouse scroll - select key object (when opening a new area)
Investigation (In Room)
- Hold Right Click and drag mouse - look around
- WASD - look around
- Esc/R - leave room
- E - slap objects around
- Q - return objects to normal
- Left Click - inspect
- Enter - display checkable objects
- F1 - open Monopad
Dialogue
- Space - autoscroll
- Left Click/Enter - advance text
- Hold Left Click - advance text quickly
- Hold Esc - advance text extremely quickly
- F1 - open Monopad
- F2 - open transcript
Death Road of Despair
- A - move left
- D - move right
- Space - jump
Nonstop Debate & Mass Panic Debate
- Mouse scroll - select bullet
- Left Click - silencer
- Repeated Left Click - silence loud voices (MPD only)
- Right Click - shoot
- Space - focus
- F1 - open list of truth bullets
Hangman’s Gambit
- Hold Left Click - reveal letters in the center of the screen
- Right Click - select letter
- F1 - show question
Argument Armament
- W - corresponds to Y
- A - corresponds to X
- S - corresponds to A
- D - corresponds to B
- Space - increase tempo
Debate Scrum
- Scroll - select bullet
- Right Click - match bullet
- W - corresponds to Y
- A - corresponds to X
- S - corresponds to A
- D - corresponds to B
Mind Mine
- Single Left Click - select group of blocks
- 3 Left Clicks - destroy isolated block
- Right Click - select object
- F1 - show question
Psyche Taxi
- A - move left
- D - move right
- W - accelerate
- S - decelerate
- Space - focus
Voting Time
- Mouse scroll/WASD - select character
- Enter - confirm vote
Mono-mono Machine
- Mouse scroll/W/S/up/down - input coins
- Right Click - spin wheel
- F1 - check presents
- Esc/R - return
Casino Game Menus
- A/D - select difficulty
- Mouse scroll/W/S/up/down - input coins
- Right Click - max bet
- Left Click - begin game
Report Card Menu
- Q/E - select student
- Mouse scroll - select section
Skills List
- Left Click - buy/equip skills
- Right Click - switch between skill lists
- Mouse scroll - select skill
Spoiler Alert!
Chapter-Specific Controls
- Left Click - disable trap (Death Road of Despair, in Chapter 5 only)
- Hold left click, then release - disable Exisals (Investigation, in Chapter 6 only)
- Right Click - open skills list (Kaede’s report card, Chapter 1 only)
- Right Click - open skills list (Shuichi’s report card, from Chapter 2 onward)