Elements of form in games are ways the storytelling is shaped by the writer, the design, the gameplay, and by the player. These elements include:
Register (poetic, prose-like, script-like, sitcom-like)
Length (vignette, 3–5 acts, epic)
Parcelling of story (episodic, sequel based, mission based, through environment, through encounters)
Agency (play between cutscenes, open world, multiple middles, multiple endings)
Platform and proximity (mobile, console, PC, local multiplayer, online multiplayer, non-screen focused)
Unit of attention (how long a play session is meant to be – a commute, a bathroom break, an evening, a weekend day)