In Memoriam (released as Missing: Since January in the US) is an adventure video game for Windows and Mac OS developed by French studio Lexis Numerique.

The game centers around the disappearance of journalist Jack Lorski, and his young female companion, Karen Gijman, in Europe while investigating a series of bizarre murders.

On this CD-ROM is a mixture of disturbing footage and reports made by Jack, but also some other data including puzzles and messages, created by someone referring to themselves only as "The Phoenix".

It turns out a group called Manus Domini, a solar cult, murdered Volker to prevent him from releasing the "cursed codex" of the Nag Hammadi.

The Phoenix in turn, is murdering the members of Manus Domini, in order to fulfill the initiation ritual of Giordano Bruno, whom he claims to be the reincarnation of.

This group had previously created the successful Uncle Albert's Adventures game series for children, whose three entries had reached combined sales above 500,000 units.

Just Adventure's Randy Sluganski reported that In Memoriam had reached 85,000 registered users by the time its European sales hit 35,000 units, and that certain registrants were based in countries where the game was not available for purchase.