Metal Slug: Awakening
is a free-to-play run-and-gun mobile game developed by Tencent. It's based on the classic arcade video game Metal Slug. The premium currency in Metal Slug Awakening is Ruby. Players can use Metal Slug Awakening Rubies to purchase items and weapons or upgrade the ability and stats of the characters.
As the premium currency, the only way to get Rubies is to top up Metal Slug Awakening
with real money. Except from the in-game store, players can also buy Metal Slug Awakening top up services from the online trading platform.
Although the price of the Metal Slug Awakening Rubies on the online trading platforms may not be cheaper than the in-game store. But for the players who don't have the required payment methods to top up Metal Slug Awakening in-game, online trading platforms are the best alternative.