Terraria

Premium currency

You do not pay in euros, you pay in gems, so you lose track of the real cost.

Evidence: Wikipedia (en): «Terraria is an outlier among the wider industry by not incorporating microtransactions to raise revenue.»

Expiring battle pass

You buy a pass and have weeks to use it. Play too little and you lose what you paid for.

Evidence: Wikipedia (es): «En Battle Royale, los V-Bucks se pueden usar para comprar artículos estéticos como modelos de personajes o similares, o también se puede usar para comprar el pase de batalla, una progresión escalonada»

Sold in parts

The full game costs more than the price on the box: there is separate paid content. Not a dirty trick, but worth knowing before buying.

Evidence: vende contenido aparte, p. ej. «Terraria: Official Soundtrack» por 4,99 € · Wikipedia (en): «It received official support when it was released as a free downloadable content (DLC) on the Steam digital distribution service in 2020.»