Colonial Conquest IIThe Settlersboth games i still find very addictive and they are also one of the few games that can be started on my WinUAE OS3.9/AGA/RTG setup from the workbench without the need for WHDLoad or other patches
Colonial Conquest II does however have some bugs in it but nothing you will encounter during regular play. (they pop up when you are really really bored. eg. when you have more than 20 or so colony ships at the same planet and try to (un)load colonists)
In case of The Settlers it is nice to have it be so compatible
while with the pc version of that game i have trouble enabeling sound on Win 98se and XPsp2
Another addictive game is
UFO-Enemy Unknown(AGA)It is also HD installable but seems to feature random crashes when switching between the battlescape and world map.
But this might be due to any number of factors not inherent to the game itself. eg custom patches and the likes wich interfere with Workbench.
The game actually does these switches in a shell script so workbench popping to front and beeing closed again before it had the chance to fully open might be the culprit of crashing when engaging a downed ufo.
The only down side of the Amiga version of UFO is that night mode was never implemented and thus some atmosphere is lost.
And again i've failed to find a working version for modern pc's
