I just have a simple question. Does The Manhattan Project have support for game pads or is it mouse/keyboard only?

According to 3D Realms's info page Manhattan Project "supports joysticks and game controllers and force feedback", so you should be all set.

I can 100% confirm controllers work and are auto recognized in the game.

it is a windows native title so if windows can see it with direct x so can the game.

Feedback can't be turned on.

I'm guessing you have an Xbox 360 Controller or compatible model? Simply install the Force Feedback Driver for XInput (for Windows 8 use the Windows 7 version). You can then enable force feedback vibration in Manhattan Project and some other older games.

I downloaded the file but the instructions are in Japanese. Where do I put the file and what are the risks? I'm using a Windows 7 PC, by the way.
Operating System: Windows 7 Home Premium 64-bit (6.1, Build 7601) Service Pack 1 (7601.win7sp1_gdr.130318-1533)
Language: English (Regional Setting: English)
System Manufacturer: Dell Inc.
System Model: Inspiron N5010
BIOS: BIOS Date: 01/09/10 15:17:22 Ver: 08.00.10
Processor: Intel(R) Core(TM) i5 CPU M 480 @ 2.67GHz (4 CPUs), ~2.7GHz
Memory: 4096MB RAM
Available OS Memory: 3958MB RAM
Page File: 3668MB used, 4247MB available
Windows Dir: C:\Windows
DirectX Version: DirectX 11
DX Setup Parameters: Not found
User DPI Setting: Using System DPI
System DPI Setting: 96 DPI (100 percent)
DWM DPI Scaling: Disabled
DxDiag Version: 6.01.7601.17514 32bit Unicode
if any of that's relevant.

For your system you want 64-bit Windows 7 用 (English). Extract the installer somewhere temporarily then run it and follow the steps.

Thanks, by the way.

Hi,
I'm running Duke MAnhaten project under Mac and my gamepad doesn't work. I have test it in other games and everything is fine. In Manhaten project I see the gamepad in controler setup, but keys simply not react and work. Do you have any advice?

Brill thanks Arkose :D
worked perfect