Titans of Steel

From publisher blurb:

Stride across the war-torn world of 2047 in an Armoured Exoskeleton (AE) designed to bring death and destruction to all who oppose peace and economic stability (or your governments right to sell them any overpriced crap they can)

In Titans of Steel the characters pilot mechas capable of dishing out large amounts of damage with huge guns and being protected by thick armour from receiving the same treatment. Enemies abound everywhere in third world countries where the interests in the members of the Treaty of Kiev's lay.