FYI, the door that appears around level 25 is actually the top of level 24. If you take it, the Kongregate recognizes it as level 24. You have to go to the door on level 29 to get the achievement.
"It is clear to everyone that eventually he will become... COMPLETELY UNKNOWN (This is a Tier 12 Result) Anon Ymous's Final Score Potential is 29073"
LOL?
It gets easy because it does not scale well with your upgrades. Just max reproduction and then target either the 2x Reproduction cells or the 2x Strength cells. If you have both, just feed the 2x Strength with the 2x Repro and attack with the 2x Strength. Also, if you start really close to the enemy, just wait for them to send their viruses off, then take their home cell.
The basic problem is that every level requires the exact same strategy to win. Bleed the enemy until they only every have 20 units max at peak, then send one stack of troops to attack the castle. When the castle reaches 75%, 50%, or 25% a major wave spawns. Just pull that one stack back, pepper the enemy with spells, and use your full army at mid-field to crush them. Rinse and repeat.
Unit badge still not working. Also, summoning uses all dead units, not just 12. This may be intentional, but it does not look like having more dead = more damage.
 "Peoples War"){kind=icon}
 "Tower of Greed"){kind=icon}
 "Obechi"){kind=icon}
 "My Pet Protector"){kind=icon}
 "Phage Wars 2"){kind=icon}
 "Epic War 3"){kind=icon}
 "The Great Siege"){kind=icon}
 "Grid"){kind=icon}