Gameover

4 clues
Message to a loser
Play-ending arcade message
Disappointing screen message
Words a pinball wizard hates to see
Similar answers:
Abjectpovert
Aboverage
Abovereferenced
Abovereproach
Acesover
Acesovereights
Actinggovernor
Admiralrickover
Agame
Agameandfinished
Agamemn
Agamemnon
Agameofdrats
Agameofinches
Agameofthrones
Agamete
Agamethat
Agametoucanplay
Agametwocanplay
Agamewhen