In Day D: Tower Rush, a professor and his robotic assistant are stranded in the past after a mishap with their time machine. Their route home runs through a dinosaur-filled world, setting up a survival battle between future technology and prehistoric force. That playful clash gives the strategy premise its central hook: the heroes must face species from an earlier age while trying to return to their own time.
The game is described as a tower defense strategy experience built around a 40-level world. Its battles pit futuristic technologies and weapons against hordes of enemies, with original opponents and fearsome bosses providing variety across the campaign. Rare fossils add another distinctive element to the setting, while the stated emphasis on game balance frames the challenge as more than a simple parade of dinosaur encounters.
Day D: Tower Rush is listed as single-player, so its time-traveling defense battles are presented as a solo experience rather than a shared multiplayer contest.