Build and Kill Zombies Free Chest – How to Unlock and Claim It
How to unlock the Free Chest in Build and Kill Zombies: like the game, join the Zombie Car Crusher group, rejoin the server, and claim from the yellow lobby zone.
The Free Chest in Build and Kill Zombies unlocks once you do two things on Roblox: like the experience and join the developer's community, Zombie Car Crusher. Neither step costs Robux, neither can be done from inside a server, and the game checks both conditions when you load in — which is why the chest stays locked for so many players. (Roblox has renamed groups to Communities, so you may see either "Join Group" or "Join Community"; both do the same thing here.)
Requirements at a glance
| Requirement | Where you do it |
|---|---|
| Like the experience | Thumbs-up icon on the Build and Kill Zombies game page |
| Join the developer community | Zombie Car Crusher group page, via "Join Group" or "Join Community" |
| Reload the check | Re-launch the game after doing both, then enter the yellow zone |
How to claim the Free Chest, step by step
- Leave the active session. Open the Roblox menu from the icon in the top-left corner, select Leave, and confirm. That drops you back onto the experience page, where both requirements are handled.
- Click the thumbs-up icon underneath the game title and the Play button. The icon fills in once the like registers, and the approval percentage ticks over accordingly.
- Scroll down the same page to the Information section and find the Developer entry, listed as Zombie Car Crusher. Click that name to open the community panel.
- Use View Community to open the full Zombie Car Crusher page, then click Join Group. The button changes state once you are a member.
- Go back to the experience page and hit the blue Play button to re-enter the game. The membership and like checks run as you load in, so an old session that is still open will not recognize the change.
- Once you spawn in the lobby, walk your character into the glowing yellow square outline labelled FREE CHEST. The chest opens on contact and hands over its contents immediately.
How to tell the unlock worked
The confirmation is the absence of the lock prompt. Before you meet the conditions, stepping into the zone throws up "You need to like & join the group!" and nothing is awarded. After a successful unlock, that message stops appearing and the chest simply opens when you stand in the outline.
Why the chest still says it is locked
- Only one condition was met. Liking without joining, or joining without liking, leaves the chest sealed.
- You never rejoined. Doing both steps in a browser tab while the game is still running does not re-run the check, so leave and re-launch.
- The like or join did not register. Reload the experience page and confirm the thumbs-up is filled in and the group shows you as a member.
- You see "Please try again in a minute." That is a cooldown, not a failure. Wait it out and step back into the zone.
Daily claim after the first unlock
The unlock is permanent, but the reward is not a one-off: according to guides and player footage, the chest can be claimed once every day, so the routine after the first time is to load in, walk into the yellow outline, and collect. Leaving the community or removing your like would put you back behind the same gate, so keep both in place if you plan on claiming it regularly. The chest's contents are described as a parts bundle plus cash — useful enough that guides recommend claiming it before your first run — though no exact item list or cash amount has been published.