retro fps 2

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Across
  1. 5. Quake's term for enemy AI files (one word)
  2. 8. Protagonist of Blood, undead gunslinger (one word)
  3. 10. DOOM's iconic "Big Fucking Gun" (one word, no spaces)
  4. 11. DOOM 2 enemy that resurrects dead monsters (one word)
  5. 17. Half-Life 1 dev test map reference (two words)
  6. 18. Tournament's predecessor, 1998 FPS (one word)
  7. 19. Quake enemy with lightning attacks (one word)
  8. 22. DOOM power-up for super punches (one word)
  9. 24. Blood item used for healing (two words)
  10. 26. Alien dimension in Half-Life 1 (one word)
  11. 27. Quake level editor (one word)
  12. 30. Half-Life 1's infamous missing texture (one word)
  13. 31. Quake's most famous deathmatch map (one word)
  14. 32. Protagonist's weapon in Painkiller (one word)
  15. 33. Half-Life 1 hidden "Ivan the Space Biker" model (one word)
  16. 34. Quake's grenade-launching monster (one word)
  17. 36. Gordon Freeman's melee weapon (one word)
  18. 37. Unreal's alien antagonist race (one word)
  19. 38. Quake enemy that spits homing
Down
  1. 1. Quake speedrunning technique (one word)
  2. 2. DOOM's fireball-throwing demon (one word)
  3. 3. Half-Life 1's giant headcrab boss (one word)
  4. 4. Protagonist of the DOOM series (two words)
  5. 6. Half-Life symbol for teleportation/science (one word)
  6. 7. UT weapon, mini-nuke launcher (one word)
  7. 9. Quake weapon firing metal spikes (one word)
  8. 12. Painkiller collectible granting bonuses (two words)
  9. 13. Blood weapon shooting lightning (two words)
  10. 14. Quake power-up, quadruples damage (two words)
  11. 15. Painkiller's stake gun (one word)
  12. 16. Half-Life 1 enemy, HECU Marine (one word)
  13. 17. Term for violently exploding enemies (one word)
  14. 20. DOOM cheat for all keys/weapons (one word)
  15. 21. Floating red demon with one eye (one word)
  16. 23. Half-Life 1 acronym, "Specialist in Charge of Grunts" (one word)
  17. 25. Co-founder of id Software, "DOOM dad" (two words)
  18. 28. First level of DOOM, "Hangar" (one word)
  19. 29. Blood enemy in robes, chants spells (one word)
  20. 35. Quake 1 engine modification (one word)