Asklemmy

I’ve bookmarked all the game suggestions in this thread myself, but haven’t tried any of them yet other than Sudoku. I have the Sudoku.com app.

Badland is a good time-killing game. Having headphones and playing with sound adds to the experience. Not sure if I paid for that one or not.

Minesweeper is a classic one that I don’t think requires internet connection.

Slither.io requires internet but is also a decent time killer.

Airline Commander is one that I’ve downloaded but haven’t tried yet. Airplane simulator that looks interesting.

This is just going through my Games folder on my Home Screen and thinking of which ones I’d play in your situation.

Ketamine

Is starting a conversation with someone an option?

Brotato, if you are using an android device.

https://play.google.com/store/apps/details?id=com.brotato.shooting.survivors.action.roguelike

This is the perfect moment to write a short story

Go outside and sit with the smokers.

Smokers talk. Everyone's equal in the smoke pit. You can meet some really interesting people that way.

A few hours of secondhand smoke won't kill you. Otherwise humanity would have gone extinct in the 70s.

If you could get a rubix cube or something at the airport, (which seems plausible) could be a lot of time spent on learning how to do it if you download instructions beforehand.

Put an alarm and sleep.

Pretty sure your username is how you kill 20 hours.

Buy a fat book.

Fuck, I could use 20 hours where there's nothing that could guilt me into feeling I could be spending my time better than gaming. Go find a nice comfy couch somewhere and just veg man, enjoy your freedom from responsibility for 20 hours. Won't happen often.

It won't kill the full 20 hours, but 2 great mobile games that I like without the gambling bullshit: Vampire Survivors and Siralim Ultimate. The first one is free, so just try it. The second one is a monster training RPG where you can make sick combos and synergies.

Don't kill your time. When you're in the final moments of your life you'll most likely wish you had more, so make the effort to be thankful for every second you have now.

Read webtoons!

Learn Chess!

Lifelong pain at a mediocre level guaranteed!

Super neat game though.

If you truly didn’t enjoy Stardew Valley, then never mind ignore this. If you felt like it had potential but it just didn’t grab you, I’d suggest giving it another shot. It hooks some people immediately but it is a bit of a slow burn for others. It’s beloved by its cult following for a reason. But again, if you didn’t like it then that’s totally legit.

If you like puzzle games, The Witness is another exceptional PC game that was impressively preserved in its entirety when it came out on mobile. The visuals are stunning (though you may not get the absolute best experience on a small phone screen, but still) and it’s got a well-earned reputation for being one of those fully-suck-you-in-lose-track-of-all-sense-of-time games.

Learn chess

Talk to people? Does the airplane have a bar? Even if you don't drink there's probably people there willing to have some conversations.

In case you get stuck again and need more games:

• DevilutionX (free, open source, needs gamedata) lets you play Diablo1 on Android, very good time killer (you might need to fetch the gamedata somewhere)
• Out There: Omega (paid but one time purchase) is a relaxed starship roguelite
• Battle For Wesnoth (free, open source) fantasy style tactical game
• Jagged Alliance 2 Stracciatella (free, open source, needs gamedata) - Jagged Alliance 2 on Android, tactical RPG, great timekiller like classic UFO or the old Fallout games.

Notable mentions: WorldOfGoo, Human Resource Machine

Do lots of drugs

If you're the self-improving kinda person, I'd suggest looking up podcasts related to your line of work, hobbies, mind and health, psychology and that sort of stuff. Last time I went on a transatlantic trip, I stocked up on podcasts and took personal notes as well as notes for my private practice. Kept me engaged for a considerable part of it (total of ~22 hours), although without delays.

Makes you a bit more active even with passive media, and since you're working towards a goal, it also probably leaves you with a productive end result, be it for yourself or ideas for work, hobbies, etc. Couple of ones I like (as reference) are:

How to be a better human; Stuff you should know; Feel better, live more; Speaking of psychology; This jungian life

If you’re an iPhone user and intrigued by mobile games, go subscribe to Apple Arcade for a month. There are a ton of fantastic games without the bs freemium shit. Monument Valley and Alto’s Adventure (and their respective alternative titles) are great starters. I’m also a big fan of Good Sudoku which will teach you techniques to get better at solving them.

I’m sure you can get a lot better recommendations on current Apple Arcade games from social media or hopefully here on lemmy.

If you can get an emulator on your phone you can play old games. Nealy endless hours of fun to be had. I recommend lemuroid and Legend of Zelda A Link to the Past.

If I had that long of a layover I'd leave the airport and go check out the city I was in. I had an AWESOME 12 hour layover in London once.

Hey, how did you get on? Hope the 20 hours passed ok and you had a good flight :-)