In terminal mode you can input various 8 character-long cheat codes: it launches a game with unique effects on top of it (but it also disables saving and achievements :c ).

Here are some that I found to be the most fun:

• Attactics: SLOW-DOWN, makes the game turn-based. Huge change, if you ask me.
• Devilition: EVIL-EYES, highlights tiles that will be affected by your explosives. Great if you want to play it for fun after completing the game.
• Bushido Ball: ZATO-1CHI, makes the ball completely invisible. They hate us.
• Campanella: BEAN-DRIP, lets you play through bonus levels.
• Warptank: SLIM-TANK, lets you play as a slime. No hub and you can't use checkpoints.
• Mortol 2: BENE-DIKT, removes the Scout and Gunner classes from the game. My playthrough was big on Scout so it's hard to imagine beating this game w/o them!
• Pingolf: STAR-BALL, lets you play as Waldorf or Pilot. No mechanical changes.
• Party House: MAKE-GLEE, lets you create your own scenario!
• Valbrace: 4RCH-M4GE, start with 15 WIS but 0 STR.
• Valbrace, again: BUGG-BODY, lets you play as a giant insect with powerful claws!
• Night Manor: OPEN-CAGE, releases a bloodthristy hamster to crush you!!!