This stat can be grinded by searching the skeleton in the room with the hyperimmune mutation, getting the disk, then going south along the preceding corridor and heading east at the end. , then play and win Armory Codes, which is a clone of Mastermind with four positions and three digits. As long as you do not lose or leave the room, you can continue playing. Usually, you will receive 1 IP for winning, but on rare occasions, you won't gain anything.
A program for completing WOPR's game can be found here. Run wopr.bat and follow the prompts to win the game.
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