What Games Do Not Work?

I am wondering, what games/systems have people had trouble with here? I am thinking of running something more unusual and I am wondering what to avoid?

The only issue is things that require square roots. I remember some crazy formula work around, but other than that, I think damn near everything works with roll20, just some things are easier than others. So, don't avoid anything!

Some games have complicated dice mechanics that are difficult or impossible to automate without the API (but you can still roll the dice and make calculations in your head). Deck-building games like Dominion do not work with the card decks.

Close your eyes and guess what smell this is Close your eyes and guess this food from the taste

Dread (uses a Jenga tower instead of dice)

Tag is pretty hard if you're on different continents... I guess Liar's Dice maybe?

Gold said: Close your eyes and guess what smell this is Close your eyes and guess this food from the taste Aaron could write a script for that... manveti said: Dread (uses a Jenga tower instead of dice) Aaron could write a script for that... Alan H. said: Tag is pretty hard if you're on different continents... I guess Liar's Dice maybe? Aaron could write a script for that... ... I guess what i'm saying is there is no game that can't be replicated here in some fashion or other considering someone is willing to put work into it. Ziechael attempts to tag Alan H. - [[1d20+@{ziechael|tag-mod}]] vs [[1d20+@{alan_h.|dodge-mod}]] = 21 vs 17, success! Alan is it!

Ha! =D

Aaron: Your next project is to write a physics simulator from scratch so that people can play Dread on Roll20. Oh, and you'll need to write a rendering engine, as well. We can't have people missing out on the experience by playing 2D Jenga!

I'll just add that to the list.... =D

Thank you everyone for your feedback. I have decided to go in a more conventional direction.

Games with Hex Grids that use Manhattan Distance will have trouble on Roll20. This one can't be fixed with the API, so far as I know. There's also no "Align to Hex Grid". GURPS has some issues due to the above, but also due to not being able to conveniently sum 3d6 before comparing it to a target number, and problems with critical value coloring. This can be overcome with the APIs. Dice pool games are by no means impossible, but certainly inconvenient; you can't have a character sheet listing all your dice pool values, and do a convenient equivalent to "/roll dexterity + ribbon-gymnastics" for all those oddball situational rolls that come up as a combination of creativity and good roleplay; and trying to macro them all out just becomes a combinatorical nightmare. This may be overcome with the APIs. While Earthdawn's exploding dice work, its step system isn't in by default. There are APIs for it, and you might be able to macro it in, but it's by no means doable in an elementary fashion. Exalted and various White Wolf games don't work by default either; you either need correctly done rollable tables or API use to get them to work correctly.

In some whitewolf games multiple successes are required, such as in extended actions. I cant find any Macros or working advice for this. Say you have a dice pool of 7d10 you need 10 sucesses at difficulty 6, How would i write one that could roll the dice pool multiple times and track until you met or passed the required threshold and report how many time it took? not sure if this is where i should post this, but The Aaron is in this thread and if he can do jenga he may be able to figure this one out