I dont care much about battle isle or history line, tried them back in the old days and didnt like them much. But here´s the crown jewel of turn based tactical games: Incubation. If you like turn-based, tactical games you will love this one. It does everything right, from the mood to the graphics, the sound and -especially- the gameplay. It is not, as some say, a very difficult game. Of course, if your squad rushes in, all guns blazing, your marines will be alien fodder. But if you use timing, the environement and the different weapons to your advantage, every mission is very doable. It has nice RPG elements, as you progress your gear gets better and the aliens bigger; it does have this "just one more mission" and suddenly its 3 am effect. Just when i was seriously thinking about re-installing windows 98 to get this game running again from my original discs, GOG rereleases it. Huge Kudos to GOG!