Classic towers

Classic upgrades by stage

Classic Rush adds the classic upgrades stage by stage, five for each tower type: none on stages 1-2, and each new level from the stage in the first column on. On Impossible, all of them are active on every stage. The tower pages give each tower's numbers before and after.

From stage	Marksman	Barrack	Mage	Artillery
3	Selling after wave 1 returns 90% (was 60%)	Soldier health x1.1	Range x1.08	Damage x1.1
5	Range x1.1	Soldier armor +10 points	Each hit lowers armor by 3 points for good	Range x1.1
8	Hits count armor 10 points lower	Respawn x0.8, rally range x1.2	Prices x0.9	Prices x0.9
11	Range x1.1 again	Soldier health up again (+20% over the base)	Damage x1.15	Big Bertha and Tesla X104 ability prices x0.75
16	10% chance of double damage	The enemy a soldier fights takes 10% of each hit the soldier takes	Each hit halves speed for 0.5 seconds	Bombs deal full damage across the blast (the Musketeer's Shrapnel Shot too); Tesla chain jumps deal full damage

The Barrack upgrade from stage 16 also covers the Sorcerer Mage's elemental, the reinforcements and every hero except Drakkan and Ashbite; Prince Denas (stage 18) does not get it. On stage 1, Classic Rush locks Marksman Tower, Adept Tower, Footmen Barracks and Dwarven Artillery, so only level I towers are built there.