We don't have grenades for enemies in GameGuru at the moment, only rockets. When I externalise the projectile system to LUA, this whole module will be fully customizable and I will add grenades as an example of how to add your own projectiles and flak.
PC SPECS: Windows 8.1 Pro 64-bit, Intel Core i7-5930K (PASSMARK:13645), NVIDIA Geforce GTX 980 GPU (PASSMARK:9762) , 32GB RAM