Mac game publisher Feral Interactive last week posted a playable demo version of their forthcoming helicopter combat game Enemy Engaged. The demo has elicited questions from downloaders about how to actually play the game, so Feral has posted a strategy guide offering details on helicopter basics and how to complete campaign objectives. What’s more, the company on Friday also unveiled its new online e-store system. Four specific stores have been created: North America, UK, Europe and the Rest of the World. Each store will show you the same selection of games but now displays in currency local to that region. Feral has also cut prices on many titles.