Agent Armstrong is set in the 1930's where a criminal cartel known as the Syndicate is gradually taking over the world. Enter the most respected agent from the British Secret Service to track down this organization who will lead him to various locations across the world from the Amazonian Jungle to the Chicago dockyards. Armstrong must battle across 4 continents and deep underwater as the Syndicate attempt to control the world. The 30 levels are mission-based with at least 2 objectives. There are boss sequences every 5 levels or so. Whilst the game is predominantly side-scrolling there are many sequences and areas (boss areas in particular) where the action is free form.