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The Chikyuu Bouei Gun

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Title Screen

SIMPLE 2000 series Vol.31 The Chikyuu Bouei Gun

Also known as: Monster Attack (EU)
Developer: Sandlot
Publishers: D3 Publisher (JP), Agetec (EU)
Platform: PlayStation 2
Released in JP: June 26, 2003
Released in EU: February 27, 2004


CodeIcon.png This game has unused code.
DebugIcon.png This game has debugging material.
RegionIcon.png This game has regional differences.


The Chikyuu Bouei Gun is the 1st entry of the Earth Defense Force Series (Unrelated to Jaleco's 1991 shoot 'em up).

Aliens raid over Japan, deploying giant insects and UFOs! It's your job to eradicate them and save the earth! (Building demolition is permitted)

Debug Information

The Chikyuu Bouei Gun Debug Text.png

Use the following code (or set 0x01 to RAM address 0x21CA9D) to display debug information on the right top of the screen.

0021CA9D 0001
(Source: Original TCRF research)

Unused Progressive Display Mode

Enabling the below code for the EU version of the game will force an unused progressive display mode. This appears to cause movies to hang, however there is a Skip Movies code listed below to remedy this.

EU codes:

Force Progressive Display Mode (Need skip movies on)
2014D48C 24110002

Skip Movies
2013A200 03E00008
(Source: Original TCRF research)

Regional Differences

The EU version removes all Radio voices, without any effort to insert subtitles or dub the dialogue into English. This also applies to the sequel, Global Defense Force