While the Time Manipulation Device in Raven Software's Singularity allows you to manipulate objects between ages, the time wave manipulates you, forcing you to switch between present-day and the 1950's, when the titular catastrophe occurred. It's an interesting mechanic, warping the player between two different eras of a single location. At least it looks compelling now. I'm sure that by the time we get to the end of the game we'll be all, "Ho-hum, we're being time displaced again." We need to stop taking our temporal anomalies for granted.