Assertion: tube | /r/HasProperty | a freeware game
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Source sentences:
text: Tube, a freeware game for MS-DOS computers from Bullfrog Productions
text: The tube was relatively immune to vibration, and thus vastly superior on shipboard duty, particularly for navy ships with the shock of weapon fire commonly knocking the sensitive but delicate galena off its sensitive point (the tube was in general no more sensitive as a radio detector, but was adjustment free).
text: Tube, a freeware game for MS-DOS computers from Bullfrog Productions