Вот, например, Trine. Порт хороший, багов не замечено, только сорцы зажали. В результате целых 0.89% недополученной прибыли:
We are looking into this, but unfortunately it's not for certain that we will have Trine for Linux Steam.
It is a technical issue of sorts. The Linux (and Mac) ports of the Shadowgrounds games and Trine were done by a partner company and we don't actually have the sources yet.
We were planning to eventually bring the games to Steam Linux - Trine is the likely one to come out first and the SG games later. I can't give any estimates though, it will take at least months and possibly even into 2014... If/when we finally get the games on Steam Linux, we'll give Steam keys for all customers who send us a receipt or such proof of ownership on other services etc, if you're wondering.
So this is why we unfortunately can't make any promises regarding this. In any case thanks for the interest, hope this helps.
Другой пример — недавний релиз The Bard's Tale. Игра классная, но порт забагован жутко.
Почему геймдевские конторы так поступают? Неужели они только и думают, как бы купить подешевле и продать подороже?