Toxic/Bio Weapons

Evening,

Trying to find any weapon concept available for sale in the bio/toxic effect (guns, rifles etc). Seems hard to find any. Any thoughts?

Also when it comes to firing a projectile made of ooze or goo? Where would you guys turn to get some guidance or tutorial to help?

C

I would look at the Bio Rifleā€™s source code in Unreal Tournament.
https://github.com/EpicGames