Morten Monrad Pedersen
Nemo's WarI think the first edition would fit.
Pandemic: The CureI'm guessing I'm be able to fit 2 plays within 90 minutes.
One of my favorite games.
Legendary: MarvelAlso works within 90 minutes. I suggest playing the same deck configurations multiple times in a row, since it takes a while to find cards for each play and put the previous ones back in one. This gets worse the more expansions you have. You can pack it away with the "composed" decks.
One of my favorite games, but as soon as you've learned it I suggestion playing 2-handed or at the very least the advanced solo mode from the Dark City expansion (I think that's the name of the expansion).
Lagendary: AlienI love this one, but the same comments go as for Marvel and I think it would be pushing 90 minutes for me.
I had more fun with it than Marvel, because it's much more thematic and tells a better story, but the expansions made Marvel win out for me because of replayability.¨
Spirit IslandI've played 7 times with one spirit and it easily plays in 90 minutes. My first play with 2 spirits probably pushed 90 minutes and my second with 2 of the advanced spirits looks like it'll be going for longer.
I've had a lot of fun with 1 spirit, but it seems to me that 2 spirits are much more interesting and replayable.
After 17 plays I still don't think that I'd be able to play it in 90. To me it's a game you leave setup on table to play multiple times, because setup and teardown takes a long time and it takes some time to get familiar with all the rules (my first play went well over 2 hours).
I like it quite a bit, but I like most of the ones above better. It can be very punishing with downward spirals when things go wrong. Whether that's good or bad is a matter of taste.
A nice introduction to deck building that can be played multiple times in 90 minutes, but in my experience there's a dominant strategy that allows you to win pretty consistently even at the app's higher difficulty level that's harder than the one that came in the box (I don't know whether that has been updated).
Deep Space D-6A light game that can be played multiple times in 90 minutes.
It has been one of my go to travel games and I really like it, but is fairly luck dependent.
Many of the games above are in my opinion better, but I still really like and would buy new expansions if more come out.
Be sure to check out the inside of the cover for important rules in relation to the boss monster as well as the rule forum for the game here on BGG for a correction to an error on one of the boss monster cards. The error might have been corrected in the latest print.
What other games would you recommend?For simple and quick games I'll recommend the Oniverse series, particularly Onirim, Nautilion, and Aerion (in that order). Those 3 are in my top 10 solo games (out of about 160).