Atlantico: Beyond Good and Evil works 100% with Windows 8.1
I've been playing it on a machine with Windows 8.1 (64-bit of course), with a dedicated AMD HD7950 GPU.
I do *not* have to use *any* compatibility mode, just install and run.
I did turn off the HW Vertex Processing and anti-aliasing in the setup. That's it. Running it in 1800x1440 resolution.
There's so much tosh being put out as "truth" about Windows 8 and games, and not a fraction of it true. The fact is that Windows 8.1 is amazingly good for older games, it is incredibly compatible with older APIs and runs anything from notoriously buggy games such as KotOR2 to Max Payne 1, just fine.
Including Beyond Good and Evil.
If the game isn't running for someone who is using Windows 8.1 then the problem lies in other things, old drivers, incompatible hacks or 3rd party tweaks or other hardware that is incompatible.
Do not run this game in any compatibility mode, not Windows 98, not XP, nothing. Just run it. It runs. If it doesn't, then contact GOG support, they'll help - but the problem is not Windows 8.1
Sorry haters.
Can confirm that Game is running on win 8_64 without issues (GOG version). Running it in 1920X1200 with AA on a HD 7950.