Spec Ops: The Line demo released on Steam
 

Back in the day, game demos were commonplace. Before a new title would come out, gamers would be able to download a playable demo that offered just enough of a taste to figure out whether the full version was worth the asking price. Demos are rare these days, seemingly replaced by carefully scripted "gameplay" videos that lead players through brief snippets of action. Given that trend, I've gotta give it to the folks behind Spec Ops: The Line, who have released a free demo of their game a week before it's due to hit stores.

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