T.N.K III (US) is likely a sequel or continuation of an earlier tank-based arcade game. '(US)' denotes its North American release. It's probable that this game features improved graphics, gameplay, or features compared to its predecessors.  Knowing the developers and release date would provide a greater understanding of its place in arcade gaming history and its potential connection to other similar tank games.  The gameplay likely involves tank combat and strategy.

T.N.K III (US)

Syvalion (Japan)