My vote goes to Jagged Alliance.
Pst, if you already have Jagged Alliance 2, take a look here
. If you don't have JA2, why ask for JA1? :P
Not entering the contest, but +1 as usual.
I do have JA2, but have been waiting until I had the chance to play 1 first.
Is this like Baldur's gate, where you can play 1 using the engine & interface of 2?
If so, don't you need both games?