Janus Gate

Janus Gate is a top-down shooter where the player assumes the role of a scientist that has opened a portal to another dimension, but is now dealing with a malfunction of the technology and is given the task of saving this reality from being overrun by clones of himself from other places in space/time.

The player creates their own opposition by running across the room into a destabilized portal that sends the player back to the place where they started. However, there is now a clone at the other end of the room that will "replay" the player's previous actions and must be stopped before it reaches the the player's starting point and becomes a part of this reality thereby altering and likely damaging the space/time continuum forever.

Each time the player goes through a portal it stabilizes a little bit more, but it also spits out one more clone than the previous run-through. Once a player has stabilized a portal, and defeated all of the clones in that area, they will be able to advance to the next zone (five zones in total). The recording, stacking, and playback of the player's movements and actions provides a unique strategy element to what would otherwise be a traditional top-down shooter.