| Achievement | How to unlock
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| - Unlock all tower programs.
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| - Defend a server from a Polymorphic Virus infection.
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| - Defend all servers with core tower programs only.
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| - Defend a server using only tower programs with a cost of 10 or more.
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| - Achieve a highscore of over 1Mb while defending a server.
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| - 4 star a server in a single try while defending it from a Virus attack.
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| - Collect more than 128 memory units total.
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| - Collect more than 2048 memory units total.
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| - Collect more than 512 memory units total.
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| - Collect more than 8192 memory units total.
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| - Build a total of 128 tower programs.
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| - Outperform the most seasoned of players!
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| - Defend a server from a Persistant Virus infection.
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| - Defend the final Challenge Server.
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| - Achieve a highscore of over 128Kb while defending a server.
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| - Defend a server from a Compressed Virus infection.
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| - Defend a server using debuff tower programs only.
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| - Defend a server from a Encrypted Virus infection.
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| - Achieve a highscore of over 256Kb while defending a server.
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- Install Professional Antivirus
| - Achieve a highscore of over 512Kb while defending a server.
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| - Defend a server from a Replicating Virus infection.
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| - Defend a server with just delay tower programs.
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| - End a game with more than 100 extra data credits.
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| - Unlock a tower program of each type.
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- My Friend That Knows Computers
| - Achieve a highscore of over 64Kb while defending a server.
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| - Defend all servers at the 4 star level.
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| - Beat the highscore of an already 4 starred server.
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| - Boost a tower program's speed by 300%
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| - Connect to and defend the first Server map.
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| - Defend a server from a Recurring Virus infection.
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| - Defend a server from a Bypassing Virus infection.
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| - Defend the first Challenge Server.
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| - Collect 100 memory units in a single game.
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| - Defend a server using at least 3 Portal tower programs.
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| - Build a ridiculously complexe maze.
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| - Defend a server using at least 3 Proxy tower programs.
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| - Build a total of 8192 total programs.
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| - Build a total of 512 total programs.
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| - Build a total of 2048 total programs.
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| - Maintain full encryption shields without 4 starring a server.
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| - Defend a server while only using a single type of tower programs.
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| - Defend a server from a Resilient Virus infection.
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| - Defend a server from a Slippery Virus infection.
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| - Defend a server from a Mutating Virus infection.
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| - Defend a server from a Routing Virus infection.
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| - Unlock a new tower program.
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