/usr/share/games/endless-sky/keys.txt is in endless-sky-data 0.8.11-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 | "Show main menu" 27
"Forward thrust" 1073741906
"Turn left" 1073741904
"Turn right" 1073741903
"Reverse" 1073741905
"Fire primary weapon" 9
"Fire secondary weapon" 113
"Select secondary weapon" 119
"Land on planet / station" 108
"Board selected ship" 98
"Talk to selected ship" 116
"Scan selected ship" 115
"Initiate hyperspace jump" 106
"Select next ship" 110
"Select nearest hostile ship" 114
"Deploy / recall fighters" 100
"Fire afterburner" 97
"Toggle cloaking device" 99
"View star map" 109
"View player info" 105
"Toggle fullscreen" 1073741892
"Fleet: Fight my target" 102
"Fleet: Gather around me" 103
"Fleet: Hold position" 104
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