I-frames

Games run as a rapid series of frames, often 30 or 60 per second. I-frames, or invincibility frames, are a run of those frames during which a character ignores incoming damage. The most common example is a dodge roll: for a fraction of a second in the middle of the roll, attacks pass straight through you, even if they visibly connect.

I-frames also appear after you take a hit. Many classic platformers make the hero flash for a moment after being damaged; during that flashing they cannot be hurt again, which stops one enemy draining all your health instantly.

Rolling through danger

In demanding action games, mastering i-frames changes how you approach fights. Instead of running away from a sweeping attack, skilled players roll into it, timing the dodge so the invincible frames line up with the moment the blow lands. Some games let you improve this with equipment or stats that lengthen the invincible window, and players compare those options when planning a build.

The window is tiny – a fraction of a second – so players describe it in frames, the same unit a game uses to measure its frame rate. Lag or a stuttering display can make the timing feel harder to hit.

Learning to dodge on time

If a game feels brutally hard, learning its dodge timing is often the single biggest improvement you can make. Try dodging slightly later than feels natural, just as an attack is about to land, rather than the moment you see it begin. Parents watching a child repeat the same boss fight over and over are often seeing this exact practice: learning when the safe frames fall. Many games also include assist or accessibility options that widen the dodge window or slow the action, which can make the same fights far more approachable while you learn.