01Core mechanic
Drill to the Core is a browser game from GamePix.
02How a run ends
Spending every resource immediately leaves the formation unable to answer a faster unit, new lane or stronger wave.
03Opening plan
Inspect lanes, costs and unit roles first; build one dependable defense and keep a small reserve for the first surprise.
04Common mistake
Avoid upgrading everything equally. Invest in the position or production step that is limiting the whole plan.
05Advanced tip
Upgrade the position that is used most often instead of improving everything equally. A small reserve prevents one surprise wave from ending the run.