Star Citizen. Given that Cloud Imperium is pimping the Freelancer this weekend, though, it's no surprise that the space big-rig now has its own in-universe advertisement.
Genre mainstay Lance Henriksen does the voiceover honors, and there's a distinctive Firefly vibe to the whole clip, right down to the twangy guitar underneath. See for yourself after the break, and don't blink or you'll miss the Mother Trucker bumper decal!
You might also want to read Chris Roberts' latest thank-you letter penned in response to Star Citizen breaking the $45 million crowdfunding barrier.