I do second the already mentioned Silhouette (as a system), but with the caveat that the published universes tend to go for a mecha angle. I.e. the "armors" are considerably larger than a man (which is not the case in the books).

It is great for the small scale combat part though (and this works seamlessly with the rpg part), so if you grab Silhouette Core rules you can probably put together something by yourself.

Alternatively, have a look at Traveller, possibly the most recent version (Mongoose) - battle armor in Traveller is closer to the Starship Trooper concept, and you can get a supplement (Mercenary) specifically geared towards ground combat.

I do second the already mentioned Silhouette (as a system), but with the caveat that the published universes tend to go for a mecha angle. I.e. the "armors" are considerably larger than a man (which is not the case in RAH's book).

It is great for the small scale combat part though (and this works seamlessly with the rpg part), so if you grab Silhouette Core rules you can probably put together something by yourself.

Alternatively, have a look at Traveller, possibly the most recent version (Mongoose) - Battledress in Traveller is closer to the Starship Trooper concept, and you can get a supplement (Mercenary) specifically geared towards ground combat.