Crisis Force

Build Dates
An ID string listing the build version and date can be found at the end of the PRG ROM: MSTR910701 A similar ID can be found in many other Konami games.

"MSTR" means it's the "master" version of the game, and the numbers represent the date. So, this build was compiled on July 1, 1991.

Anti-Piracy
As with most of the games Konami has published after 1990, this game features a copy-protection routine. The game checks for the character with code (copyright symbol, "&copy;") in VRAM at the certain position of the title screen, and sets a flag if the test fails. If the flag is set, the game will always loop back to level 1 when you finish level 2.