Start the game with one of the following command line parameters to activate the corresponding cheat function. Note: Many of these codes will crash the retail version of the game.

CHEAT FUNCTION - CHEAT CODE
Play with 2 player split screen mouse/keyboard - -2
Use Wingman Extreme for input - -w
Use GCI flight controller on COM2: for input - -g
Use GCI flight controller on COM1: for input - -g1
Load the indicated .lvl file and records record.dat demo - -L <.lvl file>
Use VESA 640x480 for output device - -V
Null (benchmarking) GFX device - -B
Use DirectX5 for output device - -X
Record game to record.dat file - -r
Play the demo once - -p
Enable space combat - -S
Enable space Boss encounter - -O
View keyboard bindings - -?
Use fast logs - -f
Run game indicated number of times faster. - -s
Gather and dump frame rate statistics - -T
Only one sim per render - -1
Do the checksums - -c
Set the default character - -C
No logs - -N
Set screen resolution (320x200, 320x240, etc.) - -M
Set pixel format to INDEXED8 or RGB565 - -P
Abort after 100 frames - -A
Force high color - -H

Activate the following cheats by entering the corresponding codes during game play and then pressing ENTER:

CHEAT FUNCTION - CHEAT CODE
All lazers - happytrails
Automatic movement and firing until player assumes control - robot
Clear caches - clearc
Create a nearby Centipede - pede
Display diagnostic codes on screen - diags
Extremely slow game speed - slowwww
Generate report files - report
Level skip - goto
Normal game speed - normal
Purge message - purge
Return to Windows - dload
Screen modes - showz
Slightly slower game speed - slow
Slower game speed - sloww
Toggle collision boxes around objects - boxes
Toggle flight mode - fly
Toggle God mode - wimp
Toggle time codes - times
Unlimited lives - getalife
Very slow game speed - slowww
Quite game instantly - spots
Unknown - dumpcoords

To select a level, use thefollowing entries with the -L command line parameter.

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

Note: This procedure requires editing a game file; creating a backup copy of the file before proceeding is recommended. With a text editor, edit the "centi.chr" file in the "centipede/chars" directory. Locate the section marked "FIRSTINVENTORY=" and change all the 0 or 1 values to 999 for 999 shots of all special weapons.

Locate the section marked "HITPOINTS=" and change the 1 to a 0 for invincibility.