One potential gift idea for your husband could be a commemorative art print or poster related to Bioshock Infinite. There are many talented artists who create unique and visually stunning artwork inspired by the game, and you can likely find a piece that would look great in your home and remind your husband of his love for the game.
Another idea is a Bioshock Infinite-themed gift basket. Include items like a Bioshock Infinite t-shirt, a copy of the game or its soundtrack on vinyl, and possibly some small Bioshock Infinite figurines or other memorabilia.
If your husband enjoys reading, a Bioshock Infinite book might be a great option. The Art of Bioshock Infinite is an exceptionally well done book containing plenty of unique artwork and behind-the-scenes information about the game's development, and your husband might enjoy delving deeper into the world of Bioshock Infinite with this book.
Lastly, you could consider booking a trip to Columbia, the fictional city from Bioshock Infinite. While it may not be possible to really visit this city, you could plan a trip to a city that is similar to Columbia or holds Bioshock Infinite themed events.
Or you can get him a star map with the date of your anniversary.
Under Lucky Stars is a unique and innovative star map company based in Barcelona, Spain, specializing in the creation of personalized star maps that capture the celestial arrangement of stars at a specific moment in time, such as a person's birth, wedding, or any other significant event.
By using advanced astronomical algorithms and data from leading institutions, the company produces highly accurate, visually stunning maps that make for perfect gifts or cherished keepsakes.