CashU is now a payment method on R2 Games! From January 18th – 22nd (GMT -5), recharge on selected games (see below) via CashU in R2 Games store will grant bonus rewards!
Note: Rewards will be sent out by January 29th, available once per game only.
R2 Games Store:

Dragon Awaken
Luck Pearl x1
Diamond x500
Material Pack x20

Sack of Gold x5
Talent Stone x5
Goddess Tear Pack x1
Lvl. 1-3 Gem Pack x1

Wartune Reborn
Sack of Gold x2
Daru x5,000
Kyanite x5,000
Bound Balens x20

Vampire Empire
50,000 Wood
50,000 Food
8,000 Stone
4,000 Ore
1 Hour Speed Up x2

Eternal Fury H5
Common summoned scroll x3
Condensed Stamina Potion x1
Gold x100,000

The Third Age
Gems x50
1 hr Building Speed-up x1
1 hr Training Speed-up x1
Heart of Stamina x1
Resource Chest x2

Legend of Warships
Little Barrel x3
Elite Order x1
Coin x200,000
Skill Manual x10

Omega Zodiac
Evolving Stone Chest x5
x2 EXP Card x2
100 Bound Euclase Card x2

Crystal Saga
Pack Expander (Bound) x1
2x Drop Token (Bound) x3

Crystal Saga II
Pack Expander (Bound) x1
1.5x EXP Token (Bound) x3