In theory, Achron is a very intriguing game. In practice, the difficulties of handling multiple timelines becomes readily apparent. Namely, issuing orders in the past or the future becomes an absolute mess as old (or is it new?) commands aren't automatically overwritten, and if you change times, your new (or is it old?) orders might not be executed yet. The confusion is a direct result of the game's primary draw, and I'm not sure of a way around it. While I certainly commend the game's ability to introduce new, novel strategies thanks to time manipulation, the act of issuing a simple move order in the past and then having to wait to see the results sweep to the present will frankly befuddle a lot of players, especially as you are trying to issue different orders at other times. Still, there’s a host of strategies that you’ll only find in Achron. For a game where you are able to move forwards and backwards through time, though, there is certainly a lot of waiting for troops to move, resources to accumulate, and orders to refresh down the timeline. The game's three races play differently, at least in terms of building units and structures (all have the same basic types of units). I like how Achron allows you to organize your units into a hierarchy by specifying a commander, but it doesn't provide a list of commanders in a handy location for quick reference. The single-player campaign is painful: specific, mandatory objectives and lots of scripted events are meant to make you manipulate the timeline, but usually they just require trial-and-error repetition to navigate past whatever tough obstacle comes next. Achron also has a dearth of documentation; the game really needs brief, to-the-point hands-on tutorials for all the races and the unique time mechanics of the game. Achron features skirmish and multiplayer battles that are more appealing, and I found the AI to be decent enough to substitute for human opponents if you can't find any. In the end, though, Achron is a bright idea that falls short of enjoyable execution.