This bug already happened the same way twice, back to back and i wasn't able to properly defeat shelldiver.
The Shelldiver simply dies after the Crystal drills it for the first time. Funnily enough the game doesn't think that I actually defeated the Shelldiver, since I also don't get the "Eliminated Boss Bonus" in the scorescreen afterwards. HOWEVER, i still got the second mission for Zed, which is to defeat the Shelldiver. Kinda Wonky, I don't know what's goin on.
Step by step of the bug
Step 1
Get to Shelldiver boss
Step 2
Plant a few turrets
Step 3
Tell Crystal to open door
Step 4
Play the first phase of the Shelldiver normally (so just dodge its attacks and shoot it)
Step 5
Once the Shelldiver is "downed", tell the Crystal to drill it
Step 6
Congrats: you got the Shelldiver in one phase (i guess)
This bug already happened the same way twice, back to back and i wasn't able to properly defeat shelldiver.
The Shelldiver simply dies after the Crystal drills it for the first time. Funnily enough the game doesn't think that I actually defeated the Shelldiver, since I also don't get the "Eliminated Boss Bonus" in the scorescreen afterwards. HOWEVER, i still got the second mission for Zed, which is to defeat the Shelldiver. Kinda Wonky, I don't know what's goin on.