The Bureau: XCOM Declassified - Blobatov

The Blobatov (also known as the Goo Grenade) is rigged to catch fire when shattered). The clear glass sphere containis a radically advanced alien substance, rigged up as a grenade with primitive analog 50s era switches and hardware.

It proves satisfyingly effective when thrown at the goo; the orb shatters, the goo ignites, and the entire tar-like mass evaporates in a flash of fire and a terrorizing shriek that must be pure pain.