Medal of Honor: Allied Assault

OpenMOHAA is an open-source reimplementation of the Medal of Honor: Allied Assault engine by EA Games / 2015 Inc. (2002). It is a cinematic World War II first-person shooter where you play as Lt. Mike Powell of the OSS, participating in key battles from the Normandy landings to Berlin. Batocera supports the base game and both expansion packs: Spearhead and Breakthrough. This system scrapes metadata for the “ports” group(s) and loads the mohaa set from the currently selected theme, if available. Grouped with the “ports” group of systems.

Quick reference

  • Emulator: OpenMOHAA
  • Folder: roms/mohaa/
  • Accepted ROM formats: .mohaa

BIOS

No OpenMOHAA emulator in Batocera needs a BIOS file to run.

ROMs

You need the original Medal of Honor: Allied Assault game data files. We recommend getting the Medal of Honor: Allied Assault War Chest from GOG.com, which includes the base game and both expansion packs. Copy the game contents into /userdata/roms/mohaa/. Then create an empty file with a .mohaa extension in the same directory.

Directory structure

/userdata/roms/mohaa/
               ├── main/
               |    ├── pak0.pk3
               |    ├── pak1.pk3
               |    ├── pak2.pk3
               |    ├── pak3.pk3
               |    ├── pak4.pk3
               |    └── pak5.pk3
               ├── mainta/
               |    └── (Spearhead pk3 files)
               ├── maintt/
               |    └── (Breakthrough pk3 files)
               ├── Medal of Honor - Allied Assault.mohaa
               ├── Medal of Honor - Allied Assault - Spearhead.mohaa
               └── Medal of Honor - Allied Assault - Breakthrough.mohaa

Game version detection

The game version is auto-detected based on keywords in the launch file name:

Launch file keyword Game version Data directory
(default) Allied Assault main/
“spear” Spearhead mainta/
“break” Breakthrough maintt/

Name your launch files accordingly, e.g. Medal of Honor - Allied Assault - Spearhead.mohaa must contain “spear” for Spearhead to be detected.

These games are ideally designed to be played with a mouse and keyboard. A gamepad controller mapping is however provided for controller use.

Saves

Save location system/configs/openmohaa/

Emulators

OpenMOHAA

Standardized features available: mohaa.videomode, mohaa.padtokeyboard, mohaa.bezel, mohaa.bezel_stretch, mohaa.hud, mohaa.hud_corner, mohaa.bezel.tattoo, mohaa.bezel.tattoo_corner, mohaa.bezel.tattoo_file, mohaa.bezel.resize_tattoo

Video settings

ES setting name batocera.conf_key Description ⇒ ES option key_value
COLOUR DEPTH mohaa.mohaa_colour Choose the emulated colour depth.
⇒ Default 0, 16-bit 16, 32-bit 32.
TEXTURE DETAIL mohaa.mohaa_texture Choose the level of texture detail.
⇒ Low 2, Medium 1, High 0.
TEXTURE COLOUR DEPTH mohaa.mohaa_texture_colour Choose the texture colour depth.
⇒ Default 0, 16-bit 16, 32-bit 32.
TEXTURE FILTER mohaa.mohaa_texture_filter Choose the texture filter type.
⇒ Bilinear GL_LINEAR_MIPMAP_NEAREST, Trilinear gl_linear_mipmap_linear.
WALL DECALS mohaa.mohaa_decals
⇒ Off 0, On 1.
WEATHER EFFECTS mohaa.mohaa_weather
⇒ Off 0, On 1.
BRIGHTNESS mohaa.mohaa_brightness Change the game's brightness.
⇒ Slider from 0.50 to 3.00 (step 0.10).
TEXTURE COMPRESSION mohaa.mohaa_compression Increases texture quality.
⇒ Off 0, On 1.

Advanced options

ES setting name batocera.conf_key Description ⇒ ES option key_value
VIEW MODEL mohaa.mohaa_view Choose the character view type.
⇒ None 0, Gun Only 1, Full 2.
SHADOWS mohaa.mohaa_shadows Choose the amount of shadow detail.
⇒ None 0, Simple 1, Complex 2.
TERRAIN DETAIL mohaa.mohaa_terrain Choose the level of terrain detail.
⇒ Low 0, Medium 1, High Detail 2, Max Detail 3.
MODEL DETAIL mohaa.mohaa_model Choose the level of model detail.
⇒ Lowest 0, Low 1, Medium 2, High 3, Higher 4, Highest 5.
EFFECTS DETAIL mohaa.mohaa_effects Choose the level of effects detail.
⇒ Minimum 0, Lower 1, Low 2, Medium 3, High 4, Higher 5, Max 6.
CURVE DETAIL mohaa.mohaa_curve Choose the level of curve detail.
⇒ Lowest 0, Low 1, Medium 2, High 3.
SUBTITLES mohaa.mohaa_subtitles
⇒ Off 0, On 1.
REAL DYNAMIC LIGHTING mohaa.mohaa_dynamic_lighting
⇒ Off 1, On 0.
FULL ENTITY LIGHTING mohaa.mohaa_entity_lighting
⇒ Off 1, On 0.
VOLUMETRIC SMOKE mohaa.mohaa_smoke
⇒ Off 0, On 1.
WEAPONS BAR mohaa.mohaa_weapons
⇒ Off 0, On 1.
CROSSHAIR mohaa.mohaa_crosshair
⇒ Off 0, On 1.

Controls

Here are the default OpenMOHAA controls shown on a Batocera Retropad:

Gamepad button Action
Left analog stick Move / Strafe
Right analog stick Look (mouse)
D-pad Up Sprint
D-pad Down Crouch
D-pad Left Previous weapon
D-pad Right Next weapon
A (South) Jump
B (East) Use
X (West) Drop weapon
Y (North) Reload
L1 Lean left
R1 Lean right
L2 Secondary attack
R2 Primary attack
L3 Objective
R3 Toggle item
SELECT Menu

Troubleshooting

My game does not launch

  • Make sure the main/ folder exists and contains the .pk3 files from your game installation.
  • For expansion packs, verify that mainta/ (Spearhead) or maintt/ (Breakthrough) folders are present.
  • Make sure the launch file name contains the correct keyword (“spear” for Spearhead, “break” for Breakthrough).

Further troubleshooting

For further troubleshooting, refer to the generic support pages.

  • systems/mohaa.txt
  • Last modified: 5 weeks ago
  • by wizzard