Thorvald of Lym said:
This is, however, only a text change. To my knowledge, there is no way for Civ2 to differenciate between a regular game and OCC.
You'd need to hack hallfame.dat for that. If you get hold of a hex-editor, that shouldn't be too difficult. I just had a sniff around the file; each game entry is 72 bytes:
2 bytes - Score (0xFFFF when scrubbed from list)
2 bytes - Difficulty level, refers to @DIFFICULTY table in rules.txt (0x0080 denotes Cheat Mode).
2 bytes - Number of turns
2 bytes - Date
2 bytes - Population/1000
2 bytes - Objectives (0xFFFF for non-objective game)
2 bytes - Unknown
2 bytes - Unknown
2 bytes - Scenario flag (0x0080)
2 bytes - Civilization Rating % (0xFFFF when score scrubbed)
2 bytes - Leader Gender (0x0000 = Male, 0x0001 = Female)
2 bytes - Leader Title, refers to @MALEFAME or @FEMALEFAME table in game.txt (0x0000 - 0x0017).
24 bytes - Leader Name String
24 bytes - Tribe Name String
You could easily add '(OCC)' to either the leader name or tribe name strings.