There're three kind of Crates and Coupons in game:
Crates:
1. Premium Crate (Can be opened by using Premium Crate Coupon or UC);
2. Classic Crate (Can be opened by using Classic Crate Coupon or UC);
3. Supply Crate (Can be opened by using Supply Crate Coupon or UC).

Coupons:
1. Premium Crate Coupon (Combined with 10 Premium Crate Coupon Scraps) ;
2. Classic Crate Coupon (Combined with 10 Classic Crate Coupon Scraps);
3. Supply Crate Coupon (Combined with 10 Supply Crate Coupon Scraps).

Crates can be opened by using corresponding Coupons or spending UC directly, the Scraps can be gained from some specific events or opening the Crates.

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