The obvious answer is the other two casual classics: Space Cadet Pinball and Minesweeper. Possibly also some of the classic board games like Chess, or Go.

I mean, he’s not asking for help rooting directly, or for people to feed him instructions on every one of these devices. His question is intentionally left open for any pointers people can give, from a “I rooted the Samsung and its pretty easy to do”, to links to other webpages (which are exactly the sort of resource someone would have bookmarked while also being a nightmare to find on Google), to -yes- full step by step instructions for those willing to provide. He’s asking for direction, not demanding someone do the work for him.

What are the other alternatives?

Does GOG allow it? I expect theres a clause for that in their TOS too.

Edit:

Regarding accounts, from their TOS:

(h) Don’t share, ‘buy’, ‘sell’, transfer, gift, lend, steal, misappropriate or misuse GOG accounts.

That said, I’m looking for details for individual games, but odds are, the rules are the same. Yes, you can still do it, but you can on Steam as well and if you’re disregarding legality, theres always other options.

Edit 2:

3.3 Your GOG account and GOG content are personal to you and cannot be shared with, sold, gifted or transferred to anyone else.

From https://support.gog.com/hc/en-us/articles/212632089-GOG-User-Agreement?product=gog

Its effectively unlimited trialware, like WinRar. Its provided free and has no payment verification, but if you use it regularly, you’re expected to pay the approximately $10 price tag.