The first prequel to the series, as well as the first handheld installment, God of War: Chains of Olympus took us six months in to Kratos' early days of work for the gods, so he could get his revenge.
Chains of Olympus was hailed in its day for being one of the best portable games of all time since it managed to put everything you wanted in a God of War game on to a handheld system. That said, Chains of Olympus hasn't aged that well, especially compared to the series' other handheld title.
Chains of Olympus feels much more simple when compared to other installments. It's mostly just filled with combat, at the cost of variety and the epic boss battles that previous games had.
The story, despite having a great ending, doesn't really add much to the series lore, and the characters introduced here aren't that memorable. It's still a decent title, with the trademarked combat being up to snuff, but it's just one that feels like a product of its time.