Have you considered making this a Far Cry mod? Much as I like HL2, it isn't the best when it comes to making terrain based maps. Your mapping is good, but the wilderness areas are still a bit empty, small and unconvincing. They remind me of a golf course :P .
But using the FC engine, you could make forests, realistically sized mountains and huge areas to explore. And the indoor dungeons would still look as good.
nh3
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