Assertion: doom's release | /r/HasProperty | based on its version of the doom engine
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Source sentences:
text: Doom II: Hell on Earth was released in 1994, followed by two other official releases based on its version of the Doom engine: Master Levels for Doom II in 1995, and Final Doom in 1996.
text: Doom II: Hell on Earth was released in 1994, followed by two other official releases based on its version of the Doom engine: Master Levels for Doom II in 1995, and Final Doom in 1996.