Compacted

"Compacted" is a sidequest of Episode 5: Spaced Out.

How to start the sidequest
Once you reach the Mysterious Space Station take the right entrance and go all the way to the right, then down, then right again to reach a room with guitars. From there take the north-east corridor, keep going right, then up, right, down and then right again to reach the Garbage Compactor 3263827 room. Reach the ladder and the quest will start. Note: The RcMeal box in the room can be reached only after completing the quest (whether you save Ben or not). You will also be able to fight a Trash Monster mini-boss which will grant, once defeated, the Blast It, Will You?! achievement. 

Walkthrough
"Ben is trapped in garbage compactor 3263827 and he needs your help shutting it down. You can either choose to drop the scape ladder, or turn on the compactor."

Objective: Save or compact Ben.
You can chose whether to save Ben or compact (kill) him. Both choices will give the same reward but the choice may affect the damage of battle items affected by moral choices like the Star Figure or have consequences in future episodes. 

Walkthrough if you choose to save Ben
Press the button on the "Save" console to lower the ladder. You will be awarded with 200 XP. 

Walkthrough if you choose to compact Ben
Press the button on the "Compact" console to compact (kill) Ben. You will be awarded with 200 XP. 