Controller Commands

Commands for gamepad configuration and controller settings

Controller commands allow you to configure gamepad behavior, including aim assist, deadzones, and analog stick movement.

Aim Assist

chimera_aim_assist

Enable Halo’s fixed aim assist for analog sticks. The PC release broke aim assist, and Chimera fixes it.

enabled · boolean

true to enable aim assist, false to disable

chimera_aim_assist true

Aim assist only works with analog stick input, not mouse and keyboard.

Analog Input Configuration

chimera_deadzones

Set deadzones for analog stick input to prevent drift and unwanted movement.

value · number

Deadzone amount (0.0 to 1.0)

chimera_deadzones 0.15    # 15% deadzone (recommended starting point)
chimera_deadzones 0.25    # Larger deadzone for worn controllers

Start with a value around 0.15 and adjust based on your controller’s condition. Increase if you experience drift, decrease if the controller feels unresponsive.

chimera_diagonals

Set diagonal sensitivity for analog stick movement. This compensates for Halo converting analog input to digital movement (the netcode doesn’t support analog movement).

value · number

Diagonal sensitivity (0.0 to 1.0)

chimera_diagonals 0.75    # Recommended value
chimera_diagonals 0.85    # More sensitive diagonals

A value of 0.75 provides good diagonal movement while maintaining accuracy.

Auto-centering

chimera_block_auto_center

Disable automatic view centering in vehicles.

enabled · boolean

true to disable auto-centering, false to enable it

chimera_block_auto_center true

Chimera fixes the frame-rate dependent auto-centering bug, so this command is primarily for user preference.

Mouse Settings

chimera_block_mouse_acceleration

Disable Halo’s built-in mouse acceleration. Halo uses raw input but adds its own acceleration on top.

enabled · boolean

true to disable acceleration, false to enable it

chimera_block_mouse_acceleration true

This only affects Halo’s internal acceleration. Your operating system’s mouse settings (bypassed by raw input) are not affected unless running in Wine.

chimera_mouse_sensitivity

Set mouse sensitivity with more granular control than Halo’s built-in settings.

horizontal · number | 'off'

Horizontal sensitivity multiplier, or “off” to disable

vertical · number

Vertical sensitivity multiplier (required if horizontal is set)

chimera_mouse_sensitivity 2 1       # Double horizontal, normal vertical
chimera_mouse_sensitivity 1.5 0.75  # Custom ratio
chimera_mouse_sensitivity off       # Use Halo's default settings

It’s recommended to disable mouse acceleration when using low sensitivity values.

Sensitivity Reference Table

Equivalent values for Halo’s built-in sensitivity settings:

Halo Setting	Horizontal	Vertical
10	4.0	2.0
9	4.0	2.0
8	3.0	1.5
7	2.0	1.0
6	1.5	0.75
5	1.25	0.625
4	1.0	0.5
3	0.75	0.375
2	0.5	0.25
1	0.25	0.125

Controller Configuration Files

For advanced controller configuration, edit the controller settings in chimera.ini. Chimera supports extensive gamepad customization including:

• Button remapping
• Trigger deadzones
• Stick curve adjustments
• Multiple controller profiles

See the Controller Configuration section for detailed information.

Premade controller configurations are available in the Chimera repository.

Auto Uncrouching

chimera_auto_uncrouch

Control whether the game automatically uncrouches when running at full speed (original Halo PC behavior).

enabled · boolean

true to re-enable auto-uncrouching, false to allow crouching while running

chimera_auto_uncrouch false  # Allow crouch-running (default)
chimera_auto_uncrouch true   # Original behavior