If you only play for the strategy and auto-resolve every battle. This game works fine. However, if you want to watch the battles or participate in them, be aware this game will crash often and repeatedly causing a loss of all battle progress and possibly campaign time (depending on your last save).
Many solutions have been offered in the forums to correct this issue, but the fact that 20 solutions are offered for the same 1 problem should raise some eyebrows, because none of them work.
The 1.52 patch is not compatable with the steam version because the files are not where the patch launcher thinks they are, and it does not offer the ability to choose a different path. Some have suggested moving the files, but this causes steam to fail to launch. You can download as suggested an exe file to correct but then it will demand a cd key. (note no posted cd keys online are valid and the game will not accept them)
The SS mod which is recommended by some changes half your ingame language to russian. Even the mod authors argue with each other over who will translate dumping it on a 3rd party who apparently never did it. (forums at pacificstorm site) Also it assumes you allready have the 1.52 patch mentioned above. The alternate mod recommended is Rising Sun but the mod author himself has posted on his facebook page the NOT use his mod with the steam version since it also does not contain the fixes from 1.52.
Other recommendations are lowering graphics (cause thats all kinds of fun) but this is not a solution and assumes the issue is your pc mainly and not the game. Lowering the troop counts, this can get you through some battles that were allready smaller with regards to participants, but the larger battles will play over a greatly extended time period (wave after wave) and will still crash in the end. Additionally retreating all re-enforcements from the battle before ending it after achieving victory and landing all aircraft (huge time suck even at accelerated game speeds) have been suggested, but once again only seem to help in smaller battles not larger extended ones. The forums from the original site also recommended disabling all autosave functions. (just fyi)
Some members from the modding community have promised a 1.6 patch which includes gameplay improvements, graphics and skins improvements and "Oh yeah!!" fixes for the crashes. A community site has been setup and has even been gifted with a few screen shots. But it is not available at this time (which doesn't help you). Basically you will be purchasing a game with no guarantee the patch will fix these issues or that it will ever be completed. (Personally, I feel the mod authors seem motivated and believe they will eventually finish the patch, but I do not know them so it is really nothing more then perhaps my own personal wishful thinking)
I like this game as you can tell by the time I have spent playing it. Good pacific war games are hard to find. The AI may not be ready to take over the world and sure there is always room for improvement but its a good game. But until a better version is loaded to steam or a patch becomes available to solve the crashes, or like me me you choose to autoresolve everything, this game does nothing except take up room in your library.