There are several OS/2 and eComStation open source games that you can chip in.
Check the Open Source Games page on this site and looks for something that can interest you.

Is there a Community that can help me start ?

If you want to start an OS/2-eCS open source game project the best place to post it is in Netlabs. Look at the site and check out the tools available for OS/2 and eComStation developers

Developing Games for OS/2 Warp
Weaver, Timothy D./Riblett, Jim
Book, CD-ROM: Graphics (multim. John Wiley and Sons Ltd,     UK, 199607.
ISBN: 0471146846.

OS/2 2.0 Programming
Schildt, Herbert
Paperback. McGraw-Hill Publishing Company, UK, 199301.
ISBN: 0078819105.

OS/2 Programmer's Guide
Iacobucci, Ed
Hardback. McGraw-Hill Publishing Company, UK, 198812.
ISBN: 007881300X.

OS/2 Warp Presentation Manager GPI
Scholin, Nora
Paperback. John Wiley and Sons Ltd, UK, 199510.
ISBN: 0471139882.

Check this books at