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Friday 12 January 2018 at 12:55
Yes. If on a home ROM, you're sick on free play.
However, in 9.4H, you can turn the 'Free only' message off in adjustments, and it will keep track of credits. (It will just let you start a game with 0 credits..)
Source: http://pinside.com/pinball/forum/topic/twlight-zone#post-4171949