Rock n' Bolt
isometric arcade action game for Commodore 64, 1985

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Use Control Port 1.
Louie The constructor struts pieces to their location. The Girders are
constantly moving back and forth. It is your job to lock them down, and then
get back to where you started the level. There are 100 levels, and two types
of levels. One is just locking down, the others you have to put them in a
specific location. There are three levels of difficulty to choose from, you
just get paid more the harder the level, and you have less time to complete
the level.
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Some useful keyboard shortcuts
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[PAUSE] - stop/continue game
[F9] - quick load game state
[F12] - quick save game state (still stored after leaving the site)
[F11] - toggle fullscreen mode
[ScrollLock] - quick switch control ports
[PageDown] - make a screenshot (320x200)