Name: Killmaiden (Steam)
Brand: Free Rabbit Games
SKU: KT-004B11CD66
Price: 1.99 EUR
Availability: InStock

A fast-paced single-player arena shooter. Choose one of three goals to win each stage, explore the tech tree, and defeat 10 bosses on the way to meet the devil on stage 66. What's the highest score you can reach? Choose Your WayFight your way through 66 levels. Choose one of three goals in each level: Defend yourself until the entire map is purified Destroy all enemy portals Find the key and escape Beat the BossesKill all ten bosses on your way to meet the devil himself. Each boss has a more or less complex level. Find out how you can beat them. Try Different BuildsChoose from 39 skills, organized into three main groups and three additional weapon groups to upgrade them. And Break the HighscoreEach difficulty has its own Steam leader board, see if you can break the high score and reach the top.

Redeem on Steam

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Step 2: Open the Games menu, then choose Activate a Product on Steam…
Step 3: Enter the key and follow the prompts.
Step 4: The game appears in your Library.

Steam's redeem page Full guide for Steam

Activation notes from the publisher

Go to: http://store.steampowered.com/ and download STEAM client Click "Install Steam" (from the upper right corner) Install and start application, login with your Account name and Password (create one if you don't have). Please follow these instructions to activate a new retail purchase on Steam: Launch Steam and log into your Steam account. Click the Games Menu. Choose Activate a Product on Steam... Follow the onscreen instructions to complete the process. After successful code verification go to the "LIBRARY" tab and start downloading.