CS3D early items walkthrough

>>>>> CS3D Early Late-Game Items Playthrough <<<<<
*Note: Assumes you have the Time Attack mode unlocked*

From the beginning of the game:
Play normally until Arthur's House, getting the Map System along the way.
(There are ways to glitch into Arthur's House, but they don't skip that much so I'm not going to bother explaining them.)
Save in Arthur's House.

>>> Part 1: Obtaining Spur (and other late-game items)

Quit out and load the Time Attack mode.
Open the inventory, quit, and reload back into Arthur's House.
Select and press A on the Map System item, which should prompt you to teleport to Bushlands. (Say yes)
***IMPORTANT:*** WAIT until the HUD reappears before closing the inventory (otherwise you'll softlock).
(Optional) Inspect the sign to Santa's House to obtain the Nemesis
Inspect the sparkling spot where Santa's Key normally is to obtain Booster 2.0, Arms Barrier, and the 290 Counter.
Make your way to the east side of the level.
(Optional) Inspect the Power Room door to obtain the Blade
(Optional) Inspect the Power Room sign to obtain Super Missiles
Save at the save point underneath the Gum room.

Quit and start a second file to get to the Hermit Gunsmith's room.
Open the inventory, quit, and reload your main file.
Close the inventory and then inspect the missile chest (next to the Grasstown Hut) to obtain the Spur.
Go back and save at the save point under the Gum room, and reload the file to un-glitch the game.

> Optional: obtaining infinite health
  Enter the Execution Chamber, open the inventory, quit, and reload.
  Close the inventory and talk to the Cthulhu underneath you to get +5 max life.
  Keep talking to him until you're satisfied with how much health you have.
  Save and reload to un-glitch the game once you're done.

Make your way back to Arthur's House and save.

(Here's a shortcut to get back quickly:
 Save in the save point room near the Power Room.
 Enter Bushlands, open the inventory, quit, and reload your save.
 Close the inventory and inspect the exit to teleport back to Arthur's House.)


>>> Part 2: Obtaining Turbocharge (makes the Spur recharge faster)

tl;dr if you're not greedy and want it right away after doing the above:
Play normally (or otherwise) until Labyrinth. Save in Labyrinth I (the first room).
Make your way to the Labyrinth Shop, then open the inventory, quit, and reload.
Close the inventory and then inspect the computer at the top of the level to obtain the Turbocharge.
Save and reload to un-glitch your game.

> BONUS: Obtaining the Beast Fang (method #32069 of getting this item)
  Use another save file to enter Yamashita Farm.
  Open the inventory, quit, and load your main file in Labyrinth I
  Inspect the Life Capsule to get the Beast Fang. (Assumes you haven't gotten that Life Capsule normally yet)

=====

If you just finished Part 1 above and really really want the Turbocharge ASAP, here's what you can do:

Start from Arthur's House (where you last saved in Part 1)
Go to Yamashita Farm, open the inventory, quit, and reload.
Press A on the Map System to teleport to Bushlands.
Wait until the HUD reappears, then select any weapon in your inventory. This will trigger the normal ending "break down" cutscene.
Once the cutscene reaches the Labyrinth (use the map on the lower screen to tell), close the inventory to cancel the cutscene.
Inspect the door to the Camp (Dr. Gero's room) to save. (The camera will be glitched so use the map to navigate)
Quit and reload to un-glitch the game, then backtrack to Labyrinth I and save there.
Follow the tl;dr above to get the Turbocharge.

To return to the beginning of the game (if you want to play a "normal" game with your new items):
Save in the Labyrinth Shop, then quit and start a new file.
Open the inventory, then quit and reload your main file (in Labyrinth Shop).
Inspect the door to go back to First Cave.
Play the game as if nothing happened (except now you have overpowered items ;) )