Why Did Gregory Kill Cassie in FNAF: Security Breach — Ruin?

In one of the endings for 'FNAF: Security Breach — Ruin,' players watch as Gregory betrays and supposedly kills Cassie during her escape. But why did he do it?

Any theories on who Cassie is and why she's helping Gregory? : r

All FNAF Security Breach Ruin DLC endings, explained - Dot Esports

Procrastination — Cassie going through walls wearing that Vanny

cohost! - #ruin

Why Did Gregory Betray Cassie In FNAF Security Ruin?

Who Is Cassie In Five Nights At Freddy's And Will She Be In The Movie?

fnaf ruin Memes & GIFs - Imgflip

Stream Cassie Sings A Song For Gregory (Five Nights At Freddy's

Gregory and Cassie, Fnaf SB, Gacha Nox in 2023

Five Nights at Freddy's: Security Breach - Wikipedia

DLC Cassie is now confrimed as Gregory's friend :D by NoriNori77

Functionally insane. — first set of fnaf ruin fanart guys we are back

Five Nights at Freddy's: Security Breach / Nightmare Fuel - TV Tropes