Buy the DVD, Get Special OP Items!

 -- (Or special duty, auxiliary) Alien officer  Officer ability is +15 at random

 -- Alien Helmet (7 days) Items to reduce a certain amount of physical strength consumption officers were installed

Upper surface dark matter armor (7 days) Have the same defense as the top surface of the grade 4 armor, armor reduction rate of 0.2% is

 Broadside armor dark matter (7 days) Have the same defense broadside armor grade 4, the rate of decrease of 0.2% speed armor

 Dark matter armor bulge (7 days) Have the same defense armor bulge grade 4, the rate of decrease of 0.3% speed armor

 Watertight bulkhead Dark Matter (7 days) Have the same defense bulkhead waterproof grade 4, the rate of decrease of 0.2% speed armor 

Considering that 5 of the 6 items given Expire in a week, and are not for sale, the long term effect of this event is very small.

(Hey, wouldn't mind having an Alien Officer)