I've been tooting the horn of GameMaker from Mark Overmars for quite some time, but lately I've felt the need to toot a bit louder. With version 6.0 - there's been added support for 3-D style graphics which seems to have resulted in an explosion of Wolfenstein-style games. It's great! I want to post again to heartily recommend you give this app a try and create for yourself that game you've always wanted to do. It's easy enough that my 7yr old can create something (with my help) while sophisticated enough through scripting that you could create a seriously nice game - and sell it yourself with no attachments from the tool. After seeing many 3D demos lately, I've gotten the idea of creating a simple Tactics clone. We'll see if this ever get's off the ground, but at least with a tool like this it's something that is very possible, instead of merely pie in the sky dreaming.
Also, it's a must to use the
Forums effectively - you can find sourcecode, help, graphics, etc. to help you in your quest for indie game stardom.