The only split-screen single player twin stick risk 'em up in which your score is meaningless unless you exist. If you do not extract you do not keep your score. Playing 'til death is not an option. Don't lose sight of your mission. Trackher.
Region: Global. Check that the key's region matches your Steam account's country before buying — region-locked keys can't be activated elsewhere.
What you get: one unique, unused product key, shown on your order page (and in your account) once payment is confirmed — usually within minutes, and at most 24 hours. No physical item is shipped.
How to activate: open the Steam client, choose Games → Activate a Product on Steam, accept the subscriber agreement and paste your key. The game then appears in your library, ready to download.
Requirements: a Steam account and the Steam client. System requirements are set by the publisher and listed on the game's Steam store page.