Meltdown is an exciting and highly addictive game for both iOS and Android devices. In the game, you take control of a powerful melting tool that you use to melt blocks of different shapes and sizes. You'll have to think quickly and act fast to clear the blocks, as the game gets progressively more difficult and challenging! The game also features several power ups and boosters, as well as different levels and modes that you can play. The game also supports leaderboards and achievements, so you can compare your scores with your friends and other players. If you're looking for an exciting and challenging puzzle game, Meltdown is the perfect choice!
AssaultCube
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Discontinued No further updates since November 2013: http://assault.cubers.net/ (like Alien Arena, also noted to be discontinued).