Yes, that’s a publicly available Unreal Engine 4. No, your eyes are not deceiving you.
For the past 9 months, UE4 has been in closed beta. Over that time it has evolved from a mere successor of UE3 into a next-generation experience. There are new Stack Overflow-style forums. The documentation is ridiculously extensive. There are sample projects galore. The community is, as always, very willing to help. This is not just a game engine, but as Tim Sweeney put it, a game ecosystem.
The engine appears to be free no longer, but rather subscription-based. I’m usually very much against subscriptions for software, but I can tell you that in this case, UE4 is a steal. For $19/month (about $230 a year), you get the best game engine on the market.
What I’m most excited about, though, is that Epic has finally open-sourced everything. They have a GitHub now! Well…okay, you need to be a subscriber first. But that sure beats the old model of paying thousands of dollars for the engine source.
The community has already made amazing leaps and bounds with UE4, and I cannot wait to see what’s coming next.