List of System Defender Stamps

This page lists stamps obtainable by playing System Defender. The stamps were first released on January 14, 2011, and there are currently 16 available.
Name 	Description 	Released Date 	Difficulty	Image
Ready For Duty 	Finish G's tutorial 	January 14, 2011 	Easy 	
Garbage Disposal 	Destroy 100 enemies in 1 level 	January 14, 2011 	Easy 	
Bug Overload 	Protect the EPF mainframe from rogue bugs 	January 14, 2011 	Easy 	
Strategic Success	Destroy 100 enemies without upgrading cannons 	January 14, 2011 	Medium 	
Mono Mechanic 	Complete a game with only one type of cannon 	January 14, 2011 	Medium 	
Tactical Pro 	Destroy 100 enemies without taking damage 	January 14, 2011 	Medium 	
Master Mechanic 	Fill every open socket with a cannon 	January 14, 2011 	Medium 	
Herbert Attacks 	Complete the level 'Herbert Attacks' 	January 27, 2011 	Medium 	
Klutzy Attack 	Protect the EPF mainframe from Klutzy 	February 24, 2011	Medium 	
Strategic Master 	Destroy 250 enemies without upgrading 	January 14, 2011 	Hard 	
Tactical Ace 	Destroy 250 enemies without taking damage 	January 14, 2011 	Hard 	
Test Bot Trio 	Protect the EPF mainframe from the Test Bots 	February 10, 2011	Hard 	
Protobot Attack 	Protect the EPF mainframe from Ultimate Protobot 	January 14, 2011 	Hard 	
Energy 9999 	Reach Maximum Energy (unreleased) 	N/A 	Hard 	
Track Herbert 	Complete the level 'Track Herbert' 	August 18, 2011 	Extreme 	
Elite Mechanic 	Upgrade all cannons in all sockets (unreleased) 	N/A 	Extreme 	
Strategic Expert 	Destroy 1000 enemies without upgrading (unreleased)	N/A 	Extreme