I'm presently running Crossover Games 9.0b4 to deal with the broken steam support in 8.x, although I have experienced this in 8.x and never bothered to report it.
Problem 1: Undetected video card (trivial work-around, new to 9.0b4 I believe)
Deus Ex GOTY edition from steam installs fine, but when I run it for the first time it pops up a config dialogue which seems unable to detect my 8600M GT and defaults to software rendering only. Forcing the game to use Direct3D regardless appears to work seamlessly, however. Minor quibble, but perhaps worth noting. The real problem however is:
Problem 2: Variable gameplay speed (present in 8.x as well)
Depending upon [I believe] system load the gameplay speed changes dramatically. Generally speaking if a voiceover (from a radio com, for instance) is playing the game plays at just slightly faster than normal (as compared to my XP desktop) however many sound files will not play to completion--radio transmissions will be cut short before they say everything the subtitles indicate should be said. When a radio transmission isn't being played, or I'm in a narrow corridor (low system load?) the game speed shoots up to at least ~150%--everything moves faster and timers on grenades and the like are significantly reduced. The end result is that passing from room to room the simulation speed can swing wildly from normal to hyper-fast without much warning.
Anyone know how I can address this?