Merge Tower Defense - UPD 6.7

Merge Tower Defense (currently at UPD 6.7) is a tower defense game by Merge Empire with 42.8 million visits, 418K favorites, and 500-1,500 concurrent players - one of the most successful tower defense launches on Roblox since releasing in January 2025. Players buy towers, place them along a zombie defense path, and merge two identical towers to create a more powerful upgraded version. The merge layer adds strategic depth that standard tower defense games lack: every placement decision also considers whether you can merge the tower for a tier upgrade rather than simply buying raw firepower. Active development at UPD 6.7 with shutdowns signaling live updates keeps the game's 26-tower catalog and 25-tier progression evolving monthly.

Tower placement and merging runs through three interlocking decisions:

• ⚔️ Place towers along the enemy path to automatically attack advancing zombie waves, earning Money from each kill to buy more towers
• 💎 Merge two identical adjacent towers to combine them into a stronger tier - clearing a slot while upgrading power simultaneously
• 🏆 Progress through 25 merge tiers tracked by 25 milestone badges, with Tier 25 representing the highest competitive achievement
• 💰 Spend Diamonds (the premium currency from codes) on premium towers and upgrades beyond what Money can access
• ⏳ Complete structured quests via the Quest Pass (499 R$) for additional progression goals layered over wave survival

Money is earned from zombie kills and funds base tower purchases. Diamonds come from codes (500-1,000 per code) and fund premium content. Energy is a rate-limited resource doubled by the Double Energy gamepass (350 R$). A Fandom wiki at merge-tower-defense.fandom.com documents all 26 towers and serves as the primary community reference. For other tower defense games on Roblox, Tower Defense Simulator and All Star Tower Defense X cover the genre without the merge layer.