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Defender Series

Wikipedia: Defender
Title ↓System ↓Year ↓

4 games in database, 0 completed (0%). Year range: 1981-1988, median: 1984.
list - box art - screenshots

 Stargate                                                Williams                        Arcade    1981                               1 logs
 Defender                                                Williams                        Arcade    1981  Mar    2 videos             10 logs
 Planetoid                                               AcornSoft                       BBC       1984                               2 logs
 Defender II                                                                             NES       1988                               1 logs