Fortnite exists in that odd space between a public beta test and a full release. Epic Games’ online tower-defense, third-person action hybrid can be purchased right now; but it’s actually launching as a free-to-play title next year. The closest equivalent is a Steam Early Access game. An Early Access purchase grants access to the live game right now, as well as some extra loot.
Fortnite’s laborious focus on grinding and digging through random loot mars an otherwise fun experience of scavenging, leveling, shooting, building, and defending with friends.