Marvin Gaye [1981] - Heavy Love Affair (aka Life's A Game Of Give And Take) (John Morales Extended Mix) Unreleased

'Life's A Game Of Give And Take' is the same song as 'Heavy Love Affair'.  The former was released on a 2007 edition of 'In My Lifetime' (disc 2 The Love Man Sessions, March-July 1979, Previously Unreleased).  The song was retitlted to Heavy Love Affair when 'In My Lifetime' was released in 1981. 

Gaye wasn't happy with the final result of the album and accused Motown of meddling with it to rush release it. After the album was issued he asked to be released from the label and CBS bought out his contract. You can read the full story on Wiki

Heavy Love Affair (John Morales Extended Mix) (unreleased)

Rare 11:20 min extended mix by John Morales

I suspect it's a 'blend' of Heavy Love Affair and Life's A Game Of Give And Take 

Life's A Game Of Give And Take

This is the version on 2007 edition of 'Im My Lifetime'

Heavy Love Affair

This is the final version released on 'In My Lifetime' in 1981