Zombs.io is a team-based tower defense game: you and your colleagues band together to build a base that fends off zombies every night. You build different types of towers to kill zombies. This is a great team building game where your team cooperates to build something together.

I used to use this game as an icebreaker to introduce my marketing team — it’s a really simple game that helped them learn to work together in a low-stakes environment.