None of those games are that recent.
Discounts over time are a perfectly standard part of their pricing strategy. It’s not even mildly unhealthy. Resellers don’t count at all, because that’s always their strategy.
The unusual part of suicide squad and skull and bones is that they’re brand new games. The discounts are not huge because there’s a problem with the market. They’re huge because they’re dogshit excuses for products and nobody is stupid enough to buy them.
3 months is recent.
A game having a significant sale 6 months or a year later is perfectly normal behavior. It tells you absolutely nothing about the industry. It’s worked that way for decades. It’s not the tiniest bit unusual.