SteamTRAIN, a Mac-only steam locomotive and train simulator, has been updated to version 2.2.1. A working Turntable and Roundhouse have been added, as well as more loco steam, over-pressure pop-valves, and a symbolic data bar. SteamTRAIN works on all Intel Macs and most PowerPC Macs with Mac OS X 10.2.3 or later. SteamTRAIN is priced at US$20 and a free demo is available.