Zombie Korps - Shoot the zombies with mouse, R to reload and place the defenders (move up/down and press space to place a fighter, or click the icon)
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Rolling Hero 2|
Using the arrow keys rotate the platform and roll the hero to collect coins, potions and the key in its way to the exit [...]
Bubble Tank Tower Defense
A nice strategy game that consists of placing tower defenses and upgrading them when possible.