A hint to all:
If you get hit with the Shield, it doesn't reset the Chain. Make sure to have one. Also the fire rate drop is very useful to clean the area.
Thanks for your comment. Items that aren't in production are hidden to make the inventory look cleaner. To show all items, click the inventory flag and select "display all items".
How to Beat Mission 9: you will need a heavy sniper to complete it like the artic sniper.
1) Shoot the tree
2) Shoot the bottle near the garage door
3) Shoot the eletric box
;_;