|Technician: Engineer||Tier 4|
|Basic (4 pt): You can now carry 1 extra sentry guns.|
|Ace (8 pt): You can now carry an additional 2 extra sentry guns.|
This skill allows you to carry 3 additional sentry guns, allowing you to carry 4 sentry guns if Aced, or 2 as secondary with Jack Of All Trades, for a total of 6 sentries if used in conjecture with the suppressed Sentry gun.
- The skill's name and effect are a reference to tower defense games, where the player must rely on tactful placement of multiple sentry towers to defend a mission critical area.