Wiktionary wrote:Noun
video (countable and uncountable, plural videos)
File:VHS_cassette_tape_05
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A VHS video casette
1. Television, television show, movie.
2. A short film clip, with or without audio (as in a music video, or one of the plethora of user-generated short movies on sites such as YouTube).
3. Motion picture stored on VHS or some other format.
4. (dated) VHS.
Usage notes
Video is used in contrast with audio, which is sound only. It is also sometimes used in contrast with film to describe all other motion picture formats, such as videotape and digital video.
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wiktionary wrote:game (plural video games)
1. A type of game existing as and controlled by software, usually run by a video game console or a computer, played on a video terminal or television screen, and controlled by a paddle, joystick, joypad, mouse, or keyboard. [
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wiktionary wrote:Noun[edit]
audio (usually uncountable, plural audios)
1. A sound, or a sound signal [
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There is no corresponding entry for audio game", but from the above examples, it's fairly easy to get either audio game, (with a space), or audiogame without one (word and Chrome's spellchecks insist that video game should have a space, but wikipedia's article suggests not).
so I would guess that Both are acceptable.
Now what we need, is to get the term audio game accepted as an English language term 
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With our dreaming and singing, Ceaseless and sorrowless we! The glory about us clinging Of the glorious futures we see,
Our souls with high music ringing; O men! It must ever be
That we dwell in our dreaming and singing, A little apart from ye. (Arthur O'Shaughnessy 1873.)
