Avid released his Free ver of Softimage named with Softimage 6 MOD TOOL .
It is connected with VALVE Engine And Microsoft XNA Game Studio. You can develop games directly for XBOX 360 and PC. Just Download the tool and start learning.
For more detail Visit :
Official Website
SOFTIMAGE|XSI Mod Tool - Create Your Future
Mod Tool For Game Companies
Thinking of a career in game development but don’t know where to start? You've come to the right place! Softimage, together with Microsoft and Valve Software, is proud to bring you SOFTIMAGE|XSI Mod Tool—a FREE 3D modeling and animation package, for non-commercial use, that plugs right into Microsoft XNA Game Studio Express and Valve Half- Life 2.
Mod Tool is built on the same powerful XSI 6 3D engine used by leading game companies like Valve, Lionhead Studios, Pandemic, CAPCOM, and more. With Mod Tool at your fingertips, you can create original games for PC and Xbox 360 using Microsoft XNA Game Studio Express, or create mods for Half Life 2! It's the easiest way to start building your game portfolio.