Marathon Infinity is the third in the Marathon series, a first-person shooter in which you are a human cyborg marine whose mission is to save humanity. In Marathon you met the aliens as they invaded a colony ship. In Marathon 2: Durandal you battled an insane Artificial Intelligence called Durandal.

In Marathon Infinity, you try to solve clues to learn the secrets behind your own existence, all the while battling the Pfhor. The game uses the Marathon 2 engine and offers new weaponry, such as the KKV-7 10mm Flechette SMG. The game features the 30-level scenario Blood Tides of Lh'owon with new textures, landscapes, and monsters as well.

The Infinity scenario is easier than the original Marathon but tougher than Marathon 2. It contains many secrets and some very complex puzzles. To extend the life of the game, a massive online fan base creates new scenarios continuously. There are difficult scenarios for those who feel the game is too easy, beautiful scenarios for those who treat computer games like tourism, and even a horror scenario, Marathon: Evil, for those who like to be terrified.

As mentioned, the game offers users the wherewithal to add their own designed maps and scenarios. It comes with Anvil and Forge, the tools that allow you to design maps and to examine the maps of others (you can also use these tools to find the secret areas in the maps supplied with the game).

If you own a version of Marathon: Infinity earlier than 1.5, you should obtain the updater to fix bugs, including one that would cause the game to occasionally ask for the serial number again. You can find demos to all the Marathon games at the Bungie website at www.bungie.net/downloads/demos.shtml. ~ Alexander Goldman, All Game Guide