Add Meritous (#278)

worlds/meritous/Rules.py

@@ -0,0 +1,22 @@
+# Copyright (c) 2022 FelicitusNeko
+#
+# This software is released under the MIT License.
+# https://opensource.org/licenses/MIT
+
+from ..generic.Rules import forbid_item, exclusion_rules
+
+
+def set_rules(world, player):
+    # Prevent PSI keys from showing up in any boss' room
+    # This is to prevent softlock from ending up having to fight a boss in the wrong boss room
+    for boss in ["Meridian", "Ataraxia", "Merodach"]:
+        for key in range(1, 4):
+            forbid_item(world.get_location(boss, player), f"PSI Key {key}", player)
+
+    # Prevent progression from showing up in last six checks per store
+    # This is to prevent softlock from high prices or low chest drop
+    default_exclude_locations = set()
+    for store in ["Alpha Cache", "Beta Cache", "Gamma Cache", "Reward Chest"]:
+        for check_number in range(19, 25):
+            default_exclude_locations.add(f"{store} {check_number}")
+    exclusion_rules(world, player, default_exclude_locations)