The following encounters are all suited to a science-fiction setting. For encounters including magical creatures and challenges, see Trials and Treasures . Creatures with no source noted can be found in Chapter 8: Alien Bestiary.

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Sci-Fi Exploring Tier 0

1-3. 1 or 2 combat drones

4-6. 1 or 2 stunner drones

9-12. 1d4 + 1 gruknka tadpoles

13-15. 1d4+1 leech creepers

16-18. Swarm of leech creepers

19-21. 1 or 2 mindspore mushrooms

21-23. 2-3 ravix

24-26. Swarm of ravix pups

27-28. 1 or 2 telethars

29-30. 1 or 2 trubbies

31-32. 1 serviceskull

33-34. 1 imprinted host (smuggler)

35-36. 1 void wisp

37-38. 1 or 2 apes (Monstrous Menagerie)

38-39. 1 voidmaw

40-41. 1 kech (Monstrous Menagerie)

42-43. 1 xenid egg or larva

44-45. 1 raptor (Monstrous Menagerie)

46-48. 1 enforcer

49-51. 1d4+1 ruffians

52-54. 1 or 2 commandos

55-57. 1 or 2 dire wolves (Monstrous Menagerie)

58-60. Blinding blizzard (Trials & Treasures)

61-63. Falling net (Trials & Treasures)

64-66. Hail storm (Trials & Treasures)

67-69. Landslide (Trials & Treasures)

70-80. 1 gray ooze (Monstrous Menagerie)

81-90. Social encounter

91-00. Travel scenery

 

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Sci-Fi Exploring Tier 1

1-2. 3 or 4 combat drones

3-4. 1 or 2 flamethrower, mortar, or shield drones

5-6. 1 or 2 sentry droids

7-8. 1d2+1 raptors (Monstrous Menagerie)

9-10. 1 triceratops (Monstrous Menagerie)

11-12. 1 gruhnka hunter

13-15. 1 or 2 hollow folk

16-18. 1 karthog

19-21. 1 giant leech creeper

22-24. 3 or 4 mindspore mushrooms

25-27. 1 mnemon

28-30. 1 longtongue ravix with 4 ravix

31-32. 3 or 4 telethars

33-34. 1d2 + 1 void wisps

35-36. 1 giant scorpion (Monstrous Menagerie)

37-39. 1 void ghost

40-42. 2 voidmaws

43. 1 voidmaw alpha

44-45. 1d4+1 kech (Monstrous Menagerie)

46. 1 gibbering mouther (Monstrous Menagerie)

47. 1 or 2 xenid stranglers

48-49. 1 or 2 bounty hunters

50. 1 contract killer

51-52. 1 grick (Monstrous Menagerie)

53. 1 khalkos spawn (Monstrous Menagerie)

54-55. 1 warstorm

56-57. 1 agent

58-59. 1 mirage monster (Monstrous Menagerie)

60-61. 1 decoyskull or spyskull

62-63. Thunderstorm (Trials & Treasures)

64-66. 1 tentacle tree (Monstrous Menagerie)

67-69. 1 yeti (Monstrous Menagerie)

70-80. 1 black pudding (Monstrous Menagerie)

81-90. Social encounter

91-00. Travel scenery

 

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Sci-Fi Exploring Tier 2

1-3. 1 processor drone with 1 or 2 flamethrower, mortar, or shield drones and 3 sentry droids

4-6. 1d4 + 1 gruhnka hunters, each with one psionic mutation

7-9. 3 hollow folk

10-11. 1 id puppeteer fleeing id puppet

12-13. 2 or 3 karthogs

14-15. 2 karthogs riding triceratops (Monstrous Menagerie)

16-17. 1 flesh guardian (Monstrous Menagerie)

17-18. 4 longtongue ravix

19-21. 1 wild taurax

22-23. 1d6 + 4 telethars

24. Plague of trubbies

25-26. 1d2+1 giant scorpions (Monstrous Menagerie)

27. 1d2 + 1 void ghosts

28-29. 1 giant grick  (Monstrous Menagerie)

30-32. 3 voidmaws and 1 voidmaw alpha

33-34. 1 tyrannosaurus rexes (Monstrous Menagerie)

35-36. 1 rock dragon (Monstrous Menagerie)

37. 2 or 3 xenid hunters

38-39. 3 bounty hunters

40-41. 1 underworld boss with 3 enforcers

42. 1 khalkos (Monstrous Menagerie)

43-44. 1 inquisitor captain

45. 1 or 2 elementals (Monstrous Menagerie)

46-47. 4 marines

48-49. 1 otyugh (Monstrous Menagerie)

49-50. 1 shambling mound (Monstrous Menagerie)

51-52. 1 or 2 battle psions

53-54. 1 psionic knight

55-56. 1d4+1 khalkos spawn (Monstrous Menagerie)

57-58. 1 murmuring worm (Monstrous Menagerie)

59-60. 1 sand ray (Monstrous Menagerie)

60-61. 1-2 thunderbirds (Monstrous Menagerie)

62-63. Caltrop mines

64-65. Marsh gas (Trials & Treasures)

66-67. Minefield

68-69. Radiation storm

70-71. 2 assaultskulls

72-74. Psychic storm

75-77. Sandstorm (Trials & Treasures)

78-80. Sinkhole (Trials & Treasures)

81-90. Social encounter

91-00. Travel scenery

 

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Sci-Fi Exploring Tier 3

1-3. 1 giant ape (Monstrous Menagerie)

3-6. 1d6 + 3 gruhnka hunters, each with the “4” psionic mutation and two random

6-9. 1 id puppetmaster with id puppet

10-12. 1 praetor

13-15. 1 xenid queen

16-18. 1 bounty hunter with inquisitor captain

19-21. 1 battle psion with 3 marines

22-24. 1 psionic blackguard

25-27. 1 sand worm or ice worm (Monstrous Menagerie)

28-30. 2 psionic knights

31-33. 2 inquisitor captains

34-36. 2 captains riding war taurax

36-38. 1 supermutant rust monster (Monstrous Menagerie)

39-41. 4 yetis (Monstrous Menagerie)

42-44. 2 khalkoi (Monstrous Menagerie)

45-47. 2 sand rays (Monstrous Menagerie)

48-50. 3 wyverns (Monstrous Menagerie)

51-53. 1 iron guardian (Monstrous Menagerie)

54-56. 1 or 2 ur-otyughs (Monstrous Menagerie)

57-59. 1 or 2 giant elementals (Monstrous Menagerie)

60-62. 2 rock dragons (Monstrous Menagerie)

63-65. 2 cloakers (Monstrous Menagerie)

66-68. 1 elder black pudding (Monstrous Menagerie)

69-71. 1 invisible render (Monstrous Menagerie)

72-74. 1 gelatinous wall (Monstrous Menagerie)

75-77. Endless plummet (Trials & Treasures)

78-80. Choking smoke (Trials & Treasures)

81-90. Social encounter

91-00. Travel scenery

 

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Sci-Fi Exploring Tier 4

1-4. 1 behemoth tyrant

5-8. 1 praetor (possessing underworld boss) with 4 enforcers and 4 ruffians

9-12. 4 or 5 wild tauraxes

13-16. 1 xenid queen with 3 xenid hunters

17-20. 2 psionic blackguards

21-24. 1 inquisitor captain with 3 warstorms

25-28. 2 praetors

29-32. 2 supermutant rust monsters (Dungeon Delver’s Guide)

33-36. 6 marines with 1 inquisitor captain

37-40. 3 khalkoi with 4 to 6 khalkos spawn (Monstrous Menagerie)

41. 1 tarrasque (Monstrous Menagerie)

42-45. 2 iron guardians (Monstrous Menagerie)

46. 1 dark lord

47-50. 1 draconic horror

51-54. 1 elysian

55-58. 1 master assassin * (Monstrous Menagerie)

59-62. 1 or 2 remorhaz (Monstrous Menagerie)

63-67. Forest fire (Trials & Treasures)

68-72. Sunspots ** (Trials & Treasures)

73-77. 4 rock dragons (Monstrous Menagerie)

78-80. 2 sand worms or ice worms (Monstrous
Menagerie)

81-90. Social encounter

91-00. Travel scenery

* The master assassin wields a laser rifle instead of a crossbow
** Instead of magic, the sunspots affect psionics