Had this back in the day on the Amiga and it's an absolute classic to my mind. Very similar to the combat section of UFO (X-COM), admittedly the UI is clunky and the fog of war effect inside buildings takes some getting used to, but there is a lot of gameplay value here. If you're new to the game, persevere beyond the first mission as it's actually the worst one. Use the map view to scan about and get a clearer picture of what your guys can actually see. Also take your time, use cover and flashbangs to your advantage, saving some time units to react in the enemy turn. If you just go in all guns blazing you'll get wiped out, but employ some tactics and the game is really rewarding.
