Over 10 years ago the world of mobile gaming was totally different from today's. Still many (if not most) phones could run installable and built in games. Which were your favorite ones?

Let's say the mobile game is retro if released before 2009.

Last month my dad had a stroke. Miraculously he didn't lose much functionality at all, though he does have some minor cognitive issues that we're working on in rehab - mainly memory. Accordingly, we want to find some games he can play on his tablet to help keep his mind active and focus his attention. But the mobile game market is hard for me to navigate and sort through for what I'm looking for.

I need games that're about a dollar or less and don't have in-app purchases. Basically games you could give to your kid and trust that they're not gonna be psychologically manipulated into wanting to empty your bank card or something like that.

Brain teasers and simple puzzles are ideal for sharpening his mind but any game that's good clean straightforward fun will work. I don't think he's going to be able to handle anything with a whole lot of moving parts like an RTS right now, for instance.

I can't afford to spend much on this and I don't know what kinds of games will interest him most so I want to give him a lot of choices. I've already looked through a couple of the other mobile game rec threads on here and I'm checking out the games listed there, but I was hoping you all could help me think of some stuff more geared to my situation. Any pointers even just on where to go looking or what to google would be appreciated. Cheers!

Edit:

Thank you all for being so supportive! I've added a bunch of the games you recommended, and I also found a couple nice lists that I thought I'd add here for anyone else interested.

Short List of Totally Free Games

10 Completely Free Mobile Games

Stay awesome tildes!

I'd like to start a discussion around collecting-based games, with the following prompt question:

What non-card-based alternatives to TCG/CCGs exist which satisfy the same criteria?

This "criteria" is my understanding of what makes TCGs/CCGs appealing, and includes but is not limited to:

• collectible/tradable (not necessarily monetized),
• portable/relatively self-contained (this could include apps, handheld consoles),
• the constant drive to expand the collection (whether it's through the randomness of distribution not ensuring particular collectibles, or an appealing reward system like in the Pokemon games).

I wish to divorce these criteria from the card format. Of course, the list of criteria not extensive and I am actively seeking a deeper understanding of what makes these card-based games so appealing. Discussions on the nature of gambling-addiction and the impact of secondary market values also very welcome.

The best example I can think of is the Pokemon games for handheld consoles. These games pre-dated the Pokemon card game and are a great example of the appeal of card games existing and thriving in a non-card format (which ironically led to the card game adaptation).

Another is Warhammer and the tabletop wargaming family. This is interesting to me but really seems to be in a completely different ballpark because it lacks agility and thus is far less appealing to many players.

Note: my reference point to what makes games like these appealing" is very biased by card games, specifically the current "big three" of TCG/CCGs: Magic: the Gathering, Pokemon, and YuGiOh. I'd appreciate suggestions of other relatively successful or simply well-designed games which employ collectibility as a core mechanic. They don't even have to be portable, as long as you're clear about that.

tl;dr: let's talk about alternatives to card games which depend on collecting as a core mechanic

Edit: formatting.