Type these inside a game level and press RETURN:

 wimp = God mode on/off
 getalife = Unlimited (?) lives
 goto = end current level
 fly = fly mode on/off
 pede = create a Centipede nearby
 robot = automatic movement and firing until player makes a movement and fires a shot
 normal = normal game speed
 slow = slower game speed
 sloww = even slower game speed
 slowww = still slower game speed
 slowwww = really slow game speed
 dload = kills game and goes back to Windows desktop

 The rest of the codes are probably only for program diagnostics.

 diags = diagnostic codes on screen on/off
 showz = screen mode (?)
 boxes = boxes around objects on/off
 times = time codes on/off
 clearc = caches cleared
 report = report files generated
 purge = purge message
 dumpcoords = ?
 happytrails = ?
 spots = ?

 Edit file cheats

 In the folder CHARS under the folder CENTIPEDE was installed into, is
 the text file CENTI.CHR (example: C:\CENTIPED\CHARS\CENTI.CHR).

 Near the end is the section FIRSTINVENTORY=
 Changing all these 0 or 1 values to 999 will give 999 shots of all
 "special" weapons (SPACEBAR or mouse button2).

 Down a little farther is HITPOINTS=
 Changing this 1 value to 0 will make your character invulnerable.

 Command-line parameters

 WARNING!: Many of these do not work and will crash the game!

 recognized options are:
 -2 Play with 2 player split screen mouse/keyboard
 -w Use wingman Extreme for input
 -g use GCI flight controller on COM2 for input
 -g1 use GCI flight controller on COM1 for input
 -L <filename> load the given .lvl file. This option does work, but
  he only ways to exit the game after running it this way are to try
  and start a new game or to use the DLOAD cheat inside a level. It also
  appears that this option records a demo into the file record.dat as
  the option -r is supposed to. Valid  level names are:
   c0l3.lvl, c0l5.lvl, c0l6.lvl, c0l7.lvl, c0l8.lvl, c0l9.lvl, c1l0.lvl,
   c1l1.lvl, c1l2.lvl, c1l3.lvl, c1l4.lvl, c1l5.lvl, c2l0.lvl, c2l1.lvl,
   c2l2.lvl, c2l3.lvl, c2l4.lvl, c2l5.lvl, c3l0.lvl, c3l1.lvl, c3l2.lvl,
   c3l3.lvl, c3l4.lvl, c3l5.lvl, c4l0.lvl, c4l1.lvl, c4l2.lvl, c4l3.lvl,
   c4l4.lvl, c4l5.lvl
 -V use vesa 640x480 for output device
 -B use null (benchmarking) gfx device
 -X use DirectX5 for output device
 -r Record game to record.dat file
 -p <demoname> plays the demo once -- benchmark
 -S Do Space Combat
 -O Do Space BOSS Encounter
 -? Keyboard Bindings
 -f do fast LOGs
 -s # run game N times as fast
 -T gather and dump frame rate statistics
 -1 Only do one sim per render
 -c Do the checksums
 -C <character name> Set the Default character
 -N No Logs
 -M <mode> res mode 320x200, 320x240, etc.
 -P <mode> pixel format INDEXED8 or RGB565 only (for now)
 -A abort after 100 frames
 -H force high color