It's tough getting past Modern Warfare 2 and Bad Company 2, but Just Cause 2 and Worms Reloaded manage it thanks to fan excitement and decent discounting. Elsewhere, Commander: Conquest of the Americas, Nitro Games' followup to East India Company, charts on two separate download services.

Just Cause 2's cheesy blockbuster action ticked all the right boxes for many PC gamers - a sun-kissed archipelago crammed with demolitions, clichéd bad-guys, all manner of vehicles, a good variety of environments, all waiting for buff special forces agent Rico Rodriguez to bless it with a particularly chaotic brand of liberation.

Gaming blog Rock Paper Shotgun's John Walker labelled it "compelling and hilarious" and entertainment website The AV Club's Russ Fischer praised its simple thrills. Steam's price cut gave the digital download parity with boxed copies, leading to this latest resurgence of interest. Canny shoppers, however, had already been purchasing the CD version and using their unique serial key to activate the game via Steam in order to enjoy the network's social benefits.

Game wesbite Strategy Informer's Joe Robinson was pleased with Commander: Conquest of the Americas, especially in comparison to the developers' previous effort East India Company. Described by him as a "must have for fans and newcomers alike," the game invites players to try their hand at colony management throughout North and South America, with a dose of naval warfare thrown in for good measure.

Steam (General gaming and own label)
1) Just Cause 2
2) Worms Reloaded
3) Call of Duty: Modern Warfare 2 - Resurgence Pack
4) Battlefield: Bad Company 2
5) Call of Duty: Modern Warfare 2

Direct2Drive (General gaming)
1) Doctor Who: The Adventure Games - Episode 1 and 2
2) Star Wars: Knights of the Old Republic
3) Sim City 4 Deluxe Edition
4) Final Fantasy XI Ultimate Collection
5) Commander: Conquest of the Americas

Impulse (Strategy)
1) Commander: Conquest of the Americas
2) Sins of a Solar Empire - Trinity
3) Need for Speed World
4) The Guild 2: Renaissance
5) Hacker Evolution: Untold + Flight Zero

Good Old Games (Classics)
1) Arcanum: Of Steamworks and Magick Obscura
2) Tropico Reloaded
3) Commandos 2 & 3
4) Commandos: Ammo Pack
5) Constructor

Note: Steam's chart is based on revenue rather than unit sales. Chart data collected on August 2. Links lead to YouTube trailers or gameplay videos.