There's a remake of Kennedy Approach available here. I used to play it a lot with a friend on an Atari 800XL.
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Kennedy Approach is (or was) an ATC simulation game that first appeared on the C64 back in the eighties. It was the first game to use a speech engine (computer generated voice) which was quite an achievement for a 64kb game. It was probably the first ever realtime strategy game (RTS).