01, ENTRYWAY: Exit switch
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02, UNDERHALLS: Exit switch
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03, THE GANTLET: Exit switch
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04, THE FOCUS: Exit switch
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05, THE WASTE TUNNELS: Exit switch
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06, THE CRUSHER: Exit switch
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07, DEAD SIMPLE: Exit switches
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08, TRICKS AND TRAPS: Exit switch
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09, THE PIT: Exit switch
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10, REFUELING BASE: Exit switch
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11, CIRCLE OF DEATH ('O' OF DESTRUCTION): Exit switch
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12, THE FACTORY: Exit portal
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13, DOWNTOWN: Exit portal
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14, THE INMOST DENS: Exit switch
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15, INDUSTRIAL ZONE: Exit portals
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16, SUBURBS: Exit portal
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17, TENEMENTS: Exit portal
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18, THE COURTYARD: Exit portal
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19, THE CITADEL: Exit portal
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20, GOTCHA!: Exit portal
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21, NIRVANA: Exit portal
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22, THE CATACOMBS: Exit switch
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23, BARRELS O' FUN: Exit portal
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24, THE CHASM: Exit portal
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25, BLOODFALLS: Exit portal
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26, THE ABANDONED MINES: Exit portal
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27, MONSTER CONDO: Exit portal
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28, THE SPIRIT WORLD: Exit portal
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29, THE LIVING END: Exit portal
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30, ICON OF SIN: Destroying an enemy ends the level
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31, WOLFENSTEIN: Exit switches
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32, GROSSE: Exit switch
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