'Wasteland' by EA, on the C64. The setting (post-apocalytpic), the excellent (for it's time) combat system, cool gear
It had a clever system where it would write back map changes to the game disks rather than keep everything in a huge
save file (this meant you had to make fresh copies of the original disks to competely restart the game).
I have put more hours into that game than into any other game I think. I still play it every now and then through various emus.
For a long time I was hoping for a re-make at some point true to the original, but it will probably never happen due to
licensing issues.
Edit: WHOA, I guess one should never loose hope! PLEASE be as good as the original...
http://wasteland.inxile-entertainment.com/