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/usr/share/games/airstrike/about.txt is in airstrike-common 0.99+1.0pre6a-5.

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             Airstrike 1.0 pre 6
                      By
    Ulf Ekstrom, programming and graphics
      Eero Tamminen, sound and graphics
         Peter Eismann, windows port
         Alessandro Giusti, graphics
	        and others.

This game is free software. For more info see
             icculus.org/airstrike