Parser IF has a simple loop:
- The game describes the current situation.
- You type a command.
- The game responds.
- You adjust your mental map and try again.
That sounds simple because the goblin-accountant of complexity is hiding in the footnotes. The trick is learning how parser worlds are usually modeled.
The parser mindset
Most parser games divide the world into rooms. A room might be a cave, cockpit, alley, kitchen, dream, moonlit garden, or suspiciously tidy wizard laboratory. Moving within a room usually does not matter unless the game tells you it does. Moving between rooms does.
Objects are usually discrete things: a lamp, coin, key, box, note, rope, bottle, or machine. Some can be taken. Some can be opened. Some are scenery, meaning they exist in the description but are not meant to be manipulated deeply.
The game is not ignoring you out of spite when DISASSEMBLE THE UNIVERSE WITH SPOON fails. Usually it only understands the actions the author prepared.
A good first routine
When you enter a new room:
LOOK
EXAMINE EVERYTHING THAT SEEMS IMPORTANT
TAKE PORTABLE OBJECTS
CHECK EXITS
SAVE
When you find an object:
EXAMINE OBJECT
TAKE OBJECT
OPEN OBJECT
LOOK IN OBJECT
READ OBJECT
When you meet a character:
TALK TO CHARACTER
ASK CHARACTER ABOUT TOPIC
TELL CHARACTER ABOUT TOPIC
GIVE OBJECT TO CHARACTER
SHOW OBJECT TO CHARACTER
Not every game supports all of those, but the pattern helps.
The four-player inventory items
A good IF player keeps four invisible tools:
- A map, because north is easy until the cave decides to fold itself into a pretzel.
- A notes file, because clues age like cheese in the back of your brain.
- Save slots, because curiosity occasionally explodes.
- A transcript, when available, because rereading the exact wording can reveal what your memory sanded off.