OK, I think I should elaborate more about my feelings about this.
Long time ago (about 25 years), there was a game named Rebelstar. It featured a group of soldiers (about 15 soldiers accompanied by 3 battle droids) aiming to break into a fortress and destroy the computer leading an army of robots. Also featured very clean graphics. Many people like ASCII graphics because it is very easy to recognize all the relevant information, contrary to graphical games; but Rebelstar's graphics were, IMO, even better at this regard. Especially cool was the targetting system, where each icon was replaced by a circle (or another simple geometric shape) and each shot was a straight line, and the first geometric shape that the line crossed was hit. (Walls were inside tiles, not between tiles like in X-COM; but geometrically, some of them were lines that were just a few pixels wide.) I think you could also play against a human (who controlled the robots then), but I have not tried it. There was also later games Rebelstar II and Lasersquad using similar ideas.
A main problem about all of these games was that they featured only a limited number of short missions (Lasersquad had about 6, and other two had just one). Thus, you could have fun with these games only once (although maybe it would be great fun to play against a human). I wanted to play more.
The man who created these games has later created X-COM, a very well known game nowadays. Although it no longer had the main problem mentioned above (it had a long campaign consisting of many tactical missions), there were many other changes which I did not like. The main one seems to be that the gameplay was 3D now. Graphics were replaced by an isometric view (IMO extremely ugly), cool targetting mode disappeared.
Well... now I would like to play a game with the same spirit as Rebelstar, but better. X-COM did not do it, and X@COM is not planned to have that spirit either. It seems I would have to make it myself...