Game development is expensive. It's not a question of the tools costing too much, though -- game engines like Unity and GameMaker Studio offer free versions, and paid versions aren't far out of reach. That's a recent occurrence -- with the last generation of game consoles (Xbox 360, PlayStation 3, Nintendo Wii), the prolific Unreal Engine was both ubiquitous and costly. Its latest iteration, Unreal Engine 4, is widely used, but has taken a sideline to free offerings from the likes of Unity. The engine's maker, Epic Games, isn't sitting idly by and letting the competition take over, though: as of this morning, Unreal Engine 4 is free for all to use.