Last Defense! is a game about saving a city from alien invasion in just twenty minutes. You play by rolling dice and moving to stop the invading monsters, free Scientists from the rubble and discover Tools. It's a simple combination of cooperative strategy brought to life by the game's real-time audio news bulletins that announce where threats are attacking.

To defend the city you work together to build a stock of Tools and Scientists to defeat the four Monsters that randomly appear in different locations. The game is managed with an app so you're on the clock and need to be quick to roll (and re-roll if you want) so you can move and use the right Tool cards to uncover Scientists from the rubble.

The app keeps track of your progress and the ever-depleting twenty minutes of playtime. Being quick and well-coordinated as a team results in being better prepared for when the app signals the next monster appears. To deal with monsters you use specific Scientist tokens that you have (hopefully) already uncovered. Part of the trick is exchanging Tools with other players to ensure the best character has what they need to free the Scientists and then get them back to the Plaza zone to defeat the Monster.

The result is a fun and tense cooperative game where you need to be efficient and collaborative. The app soundtrack and commentary are different each time you play, which adds excitement and unexpected scenarios.