I take it you mean Armor Alley (http://www.mobygames.com/game/armor-alley), released in 1991 by Three-Sixty Pacific? This game runs fine in Boxer, or at least the copy available for download from http://abandonia.com/ does; some DOS gaming sites have incomplete or just plain broken copies of some of their DOS games though, which won’t work properly in Boxer. About 90% of DOS games will run in Boxer without problems, though it is indeed a matter of “try it out and see!”

(I should note that a buggy version of Boxer 1.3 was initially released on Monday, which would freeze when launching new games for the first time. This was replaced soon after with a fixed version, but unfortunately quite a few people had already downloaded the buggy version, and this may have been the one you tested. Updating Boxer will fix the problem.)