All Alone is a very short horror game riffing on those urban myths about what can happen to women who are unfortunate enough to receive a creepy phone call late at night. You play one such woman fielding one such phone call; you're alone in your apartment when the call arrives, a storm's moving in and the TV news is yelling at you about the local serial killer.
The game is effective in evoking the fear people can experience and generate in their own homes at night, and eliciting that fear from a handful of rooms and domestic props. It also uses a couple of sound effects at choice moments. Unfortunately, it's also tremendously short and not really very interactive. Suspense is built up from a sequence of timed steps which mostly proceed no matter what you're doing. Admittedly this is a rather dull and mechanical perspective on how the game works, but if that suspense is the game's sum effect (Spoiler - click to show)(though the final twist is pretty good, too) it's too little for me in an interactive medium.
One more note: Reviews contemporary to All Alone's release (11 years ago at this time of writing) often quote the author's advice on how to play it – that is, with lights out, alone, at night. This advice wasn't anywhere in the game that I could find, so I assume it was on a promotional website which no longer exists or in a readme file which is no longer attached to the game.