If you cannot remember what a game is called, how can you have footage or screenshots? Unless it's in a YouTube video (or any other video sharing site). A game is identifiable through a list of features, so why is this off-topic?
To be honest, I find that calling these questions game-identification to be a bit of a misnomer with how the current policy stands (and I'll come back to this later). The thing is, "Game Identification" as a topic area is broad enough to stand for two separate types of questions:
- Memory-based - which are off topic:
Example: "I remember a game with a duck. What game is it?"
- Evidence-based - which are on topic:
Example: "Here is an <image / video / soundbyte> of a game, which game is it?"
The first is off-topic because - at it's core - information presented to us as a memory cannot be verified as correct. What if the user doesn't remember correctly? What if they think they're remembering a duck, but it was in fact a rooster?
Furthermore, any answers will be unable to be verified as correct by anyone but the asker. This is a big problem, as Arqade (and Stack Exchange in general) are built upon the premise that any users (including yourself) will be able to vote on answers based on their quality. With memory based game identification, we cannot be sure of the quality, so voting is almost meaningless.
Evidence-based is another ballpark entirely. The question might be about an image from a TV series where one of the characters is playing a game. It might be based on a sound clip from a game mod which the mod author pulled from another game. It could also be an advertisement for the latest gaming laptop, graphics card, game console, or digital service, or even a shout out or easter egg in another game.
These can be verified as correct by other users and do not rely on the OPs memory for information. This is why we require an audio or visual source for game identifications. As I said, 'Game Identification' is a bit of a misnomer, a closer approximation would be "Game References in other media", but that doesn't make a good tag name.
General Summary of those other questions listed as reference: So people can validate an answer or not.
Simple as that.. if a question can only be guessed at by the community and only Ok'd by the asker then we tend to frown upon it here. If you dont have a picture I invite you to join us in the chat room The Bridge and ask about it in there.. nothing is off topic to chat about.