Irrational Games Makes an Appearance
In the opening scene of BioShock, you can see protagonist Jack looking through his wallet and at a picture of his family. However, developer Irrational Games managed to slip their business card in the left-hand side of Jack's wallet. You can barely see the name of the company, but their logo is instantly recognizable for any fan of the series. You can also see the Irrational Games logo in Sander Cohen's office at Fort Frolic.