In the game T-Minus 30 the user will have to design a city and create a space fleet in order to leave Earth before a catastrophe destroys humanity and gives no chance of survival. To complete the task, the player receives 30 minutes, during which time he will need to clean up the post-apocalyptic environment, create a competent infrastructure, obtain food, generate electricity and design rockets to accommodate the largest number of people.

The city building simulator only includes a single-player mode. Events begin with an introduction to the matter. The earth is dying and humanity is on the verge of extinction. The gamer needs to complete all the tasks in 30 minutes and go into outer space on rockets, taking with him the largest number of people. The session begins with digging wells, which are required to distribute water and produce it.

Each ship is capable of saving thousands of people, but they require electricity generated by solar panels to operate. The gamer has many choices and tactics on exactly how to achieve the goal. You can stay at the level of technological development of the 60s and use old rockets, or explore new equipment and circuits, gaining other capabilities and gameplay features. The playthrough is all about always having a limited time, and each match offers procedurally generated events and difficulties.