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Duelyst has been announced to free open source but there is as well drama and questioning about the confidentiality and genuinity of the information. RXL-Realms them took the advantage to be the dark horse in this game and explained everything elegantly through out different networks. Each link will tell you something different or important make sure to visit all and join all!
RXL-Duelyst Android Github: [here]
Ragezone Participation: [here]
