I notice some issues with snake egg missions and bio barrel missions sometimes not having the requirements to fulfill the mission, or players destroying too many barrels without knowing it.  Why not resupply the mission?  Drop a bio -barrel from space if fewer than three remain.  Have the snake lay an egg every five minutes. This opens the way to having to fight over collectibles with an enemy intent on destroying them all, and snake eggs hatching larval snakes (which you can destroy,