Progression and de-progression. Perhaps a better word for the opposite but I like the antithesis simplicity.

Real-life Example:

• Progression: Had meeting with Mooktak over further design elements of the games, particularly the mechanics of the hostiles (this word is not really fair. If you’re the attacker, and the attackee is merely defending itself, calling it a hostile is presumptuous… or at least, rude). Took copious notes on iPad.
• De-Progression: Lost iPad.

Game Example:

• Progression: Improve self.
• De-Progression: Destroy world.