Yet Another Zombie Survivors Bio Lab Unlock

Official unlock gate

The official 1.0 coverage says the Bio Lab becomes available after Dead Terminal on Default. The announcement presents it as a new progression feature, not as a generic menu available from the first screen.

How to use this information

• If Bio Lab is not visible, confirm that you have reached the named Dead Terminal milestone on the Default setting.
• Keep the exact mode and milestone in your notes; “I finished a run” is not the same evidence as the official gate.
• Recheck the in-game text after updates before treating a community route as current.

The official announcement does not provide a complete upgrade table in the source used here, so this page does not fill in costs or effects from guesswork.

Troubleshooting record

If the Bio Lab remains unavailable, record the selected difficulty, the exact Dead Terminal completion state, the game version and the lock message. Those four fields distinguish a route problem from a changed patch requirement without inventing an upgrade table.