In some levels of Quantum Legacy you will be able to build a Quantum Gate, a gateway to the future. Once your Quantum Gate is built, you will be able to send your Drop-Ship 50 years into the future. Many things will have changed with the passing of 50 years. The terrain which was once grassland may have turned to desert. Resource pods will be in different locations. But most importantly, technology has advanced.

Once in the future, you will be able to able to take full advantage of any technological advances in the future by sending your Drop-Ship through the gate and building more powerful units. You can then send these units back through your Quantum Gate to the time period you originated from and use them to crush your enemies. Be forewarned though, you cannot take the technology from the future back to the past with you. If you send the Drop-Ship to your original time period, you will not be able to build future units unless you send the Drop-Ship back to the future.

Units as well as structures have a certain life time, or amount of time the unit or structure is expected to last. Units and structures with a life time of under 50 years will be gone when you go through the Quantum Gate into the future. Those with more than a 50 year life or more will be there for your disposal in the future. You will notice that in the future, those units and structures that lasted will have undergone modifications to bring them up to par with the latest technologies.

It is possible to lose units without them actually being attacked in Quantum Legacy if they undergo a quantum erasure. The most common way for this to happen is for one of your units or structures with a life time of more than 50 years to be destroyed in your original time period. Its alter-self will then undergo a quantum erasure and be erased from timeline, as it can never exist in the future if it was destroyed in the past. The other way for a unit to undergo a quantum erasure is for you to send a unit's alter-self from the future back to the past. Because the temporal laws of Saltus state that the same unit from different time periods, cannot occupy the same space or time, the unit will undergo a quantum erasure and be erased from the timeline.

Multi-time is persistant in Quantum Legacy. While time is passing from your original time period, it is also passing at the same rate through the Quantum Gate, 50 years in the future. Because you cannot be in more than one time period at a time, you will only be able to command your troops in one time period at a time. This makes it a critical part of your game to defend your Quantum Gate at all costs. Otherwise you may find yourself cut off from many of your troops.