To perform a “check” is to finish an action in the game that will grant you a Key Item when you finish. This could be through a sidequest, such as the Sunken Desert; a dungeon, such as Denadoro Mountains; or an interaction with an NPC, such as purchasing from the Snail Stop vendor or receiving an item from the carpenter's wife. Typically a player wants to finish their seed performing as few checks as possible.

To be in “Go Mode” means that you have fulfilled all of the requirements towards at least one method of finishing the game and may pursue that path at any time. Standard Jets of Time has three Go Modes: Tyrano Lair to Ocean Palace, Death Peak to Black Omen, and Magus's Castle to Ocean Palace.

A “jet seed” is a seed in which Go Mode is achieved far sooner than typical. They can be completed very quickly, but are often dangerous as the player may not have had time to accrue items and protective gear.

Tabsanity is an alternate name for the 'tb' flag.

Crabsanity is a Category which has both the 'cr' (chronosanity) and 'tb' (all treasures tabs) flags on, a portmanteau of “chronosanity” and “tabsanity”.