It sounds like you're referring to "Those Nights at Fredbear's" — a popular Five Nights at Freddy's fangame.

Night 5 Challenge: You start trapped in a springlock suit that slowly closes. You must hold SPACE to keep the suit open while avoiding Freddy and Bonnie, who will jumpscare you if they catch you moving while they check the room. Where to Play

1. Introduction
The phrase "unblocked games" has become shorthand for a digital subculture, particularly among younger audiences navigating restricted internet environments. Those Nights at Fredbear's, a fan-developed survival horror game set in the Five Nights at Freddy's universe, exemplifies this phenomenon. This paper investigates how the game's availability on unblocked game aggregators shapes both its use and the lifestyle surrounding it.

However, "Unblocked" versions are HTML5 or compressed executables hosted on proxy-friendly sites. They allow you to:

Method 2: Dedicated Unblocked Game Sites (The "Hot" List)

Several educator-unfriendly but gamer-friendly sites host HTML5 or Flash-embedded versions of TNAF. As of this writing, the "hot" unblocked domains include:

Suddenly, the screen glitches—a common issue with browser emulations—but the timing makes it perfect. Fredbear’s face fills the screen, pixelated and distorted, screaming a static-laced roar that makes you rip your headphones off.

those nights at fredbears unblocked free hot