This mod is a Scavenge Addon that makes a compat between Scavenge & GameStages.
Scavenge can be found here: https://minecraft.curseforge.com/projects/scavenge
GameStages can be found here: https://minecraft.curseforge.com/projects/game-stages

The Block Properties that this mod adds for the GameStage compat:

require_stage:
Description: Allows to check if a Player has reached a GameStage
Parameters:
"disableJEI": (Decides if the Condition is visible in JEI, Default: false) Boolean,
"name": (Which game Stage should be checkt for) String,
"required": (If the Stage is required or not allowed) Boolean,
Incompatible With: None
Type: Condition
require_multi_stage:
Description: Allows to check if a Player has reached a GameStage
Parameters:
"disableJEI": (Decides if the Condition is visible in JEI, Default: false) Boolean,
"names": (Which game Stages should be checkt for) StringArray,
"all": (If all Stages are required or just 1, Default: true) Boolean,
Incompatible With: None
Type: Condition
set_stage:
Description: Allows to grant or take a gamestage from a player
Parameters:
"disableJEI": (Decides if the Condition is visible in JEI, Default: false) Boolean,
"name": (Which game Stage should be granted and which should be taken) String,
"give": (If the Game Stage should be granted or taken, Default: true) Boolean,
Incompatible With: None
Type: Effect

Scavenge-GameStages