Bandai Namco has released their free-to-play World Trigger title on the Japanese PSN, and we have the details.

Clocking in at a paltry 45.1MB (I’ve got PS4 saves bigger than that), this tiny title sees players defending a home base from invading enemies. The catch? It’s both online and touch only (sorry offline players and PlayStation TV owners).

You can download the game here, or read about the original reveal here. Downloading before March 31st will net you a free Vita theme, as well as access to “Yuuma Kuga (Past Version).”

Are you in?