You could start by not issuing a huge amount of debt.

Prices can adjust to deflation, inflation, etc. it isn't that big a deal, they're just numbers. A few years ago it cost a whole BTC to buy a little weed online. Then nearly overnight (multiple times), it cost a whole lot less, now a small fraction of a BTC.

Stop overthinking it and buying into extreme reliance on economic theories the actual effects of which are much weaker than is suggested here. Sure there are some psychological effects from price changes, but not extreme.

What is a big deal is being in a huge amount of debt, especially when the debt currency can change radically in value. (If debt is actually needed, which is pretty doubtful for a game, then denominate it in something related to purchasing power.)

KISS.