Awesome game, best thing to come out since the ledgendary UFO: Enemy Unknown. Its pretty unforgiving but challenging.
This game has amazing graphics / ragdoll / physics and a fully destructable environment. Something that no other game has matched to date. Its basically an anything goes turn based fight to the death. You can use cover, destroy whole buildings and generally turn the surrounding maps into smoking piles of rubble.
The only drawbacks are no multiplayer & slow music. But this doesn't detract from a great game. Its now the basis for another great series, Jagged Alliance 3. Also check out sentinels, its basically and advanced version of silent storm.