video game, Counter-Strike: Global Offensive, CS:GO, obtaining crates, loot boxes, in-game drops, post-match rewards, playing matches, community market, Steam marketplace, trading with other players, opening cases, keys purchase, rare skins, weapon cases, crate unboxing, inventory, collectibles, virtual items, game economy, online multiplayer, FPS game, random chance, cosmetic upgrades, skin rarity, eSports, gaming community, trade-up contracts, Valve Corporation, digital goods.