Thanks for replying Nord. I will put this into consideration.
I was thinking more in the line of a grenade or high explosive type weapon but enhance to the point that it can smash half of the battlescape mission map. The Alien terrorist would have it in their possession in the Aliendeployment. At the beginning of the game, the Alien will arm and throw it on the ground, just like it throws a grenade. In this case here, it is not throwing at your soldier but a random square near to it. Then the bomb is armed. From then on you have to find and pick it up in X turn. If not, half of the map goes and if your soldier is within the blast radius.. game over.
I am thinking in the line of having a self destruct, like a turret or item you drop into a ufo.rul. This item will have a percentage chance of arming and you have to get inside the ufo and disarming at X turn before the ufo turn inside out in a crash ufo or mission site. The reasoning behind this of a few.
1) add tension in the game that you have to disarm the bomb in X turn.
2) If bomb goes off and your soldier caught in the radius, tough luck.
3) Alien prevent you from salvaging valuable loot from their crash ufo.\
Still, if anyone can throw in ideas how to make this work without new coding. I am all eyes. Thanks.