Offensive Combat rides a new wave of freemium, or free-to-play, multiplayer shooters that raise questions about the future of the genre. To celebrate the milestone, U4iA Games is offering double-XP in the game all weekend long.

Offensive Combat offers not only outfits and other low-impact items in the in-game cash shop, but also full weapons, buffs and healing items. These items are a much-needed source of income and generally follow the best rule of microtransactions: If you're to sell an item, no matter whether it's powerful, sell that item from the beginning. Developers need to set the tone of the cash-shop early to craft the culture of the game.

Players can be surprised when a game suddenly starts to sell powerful or very useful items in a game that normally did not feature them, but if that game is set up from the beginning to offer powerful items, then the player base has no reason to be surprised. The players are already comfortable with the decision to sell those items.

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