For some time now, me and my brother have been working on a Custom Robo adaption for Blockland. If you don't know what Custom Robo is, you should look it up. It's a great game.
In Custom Robo, you have three types of weapons.
The gun: Self explanatory. Guns shoot in different patterns/styles.
The bomb: Fires a missile or bomb.
However, it's the third type of weapon that is unique. The pod. When the pod is fired, it deploys what can be called a "smart bomb". Pods will either travel around slowly or stay in place until an opponent is nearby, then seeks out and explodes near the enemy.
To balance the weapon, the max pods that can placed at once should be no more than 3. (Normally two if the bomb has strong homing)
So, for anyone looking to create an original weapon, I'm throwing this out there. Discuss usefulness/possibilities below.