# Steam & Bullets — Merge Tower Defense on Rails > Merge Tower Defense on Rails (iPhone/iPad app by Rodrigo Laiz.) - Source: https://appshunter.io/ios/app/steam-and-bullets/id6762451724 (this page in markdown: same URL + `.md`) - Developer: [Rodrigo Laiz](https://appshunter.io/developer/1884082694) - Category: Games, Entertainment, Simulation, Strategy - Price: Free - Age rating: 4+ - Requires: iOS 15.0 · 219 MB - Languages: American English - Released: 2026-05-05 - Data updated: 2026-08-17 - User reviews in markdown: https://appshunter.io/ios/app/steam-and-bullets/id6762451724/reviews.md ## What is Steam & Bullets? STEAM & BULLETS Defend a moving train across a ruined world. Spawn defenders, merge them into unstoppable units, and survive wave after wave of raiders, climbers, brutes, and drones or watch the locomotive fall. MERGE TO WIN Tap to spawn random defenders on your 3×3 wagon grids. Drag identical units together to merge them into stronger, deterministic level-ups — no random type switches. Stack up to Level 5 for game-ending firepower. BUILD YOUR CREW Gunners -> reliable DPS on every wave Snipers -> long-range burst elites Flamethrowers -> short-range area burn Shields -> absorb hits and protect the grid Bombers -> slow fire, massive splash DEFEND THE TRAIN Three wagons. 27 cells. One locomotive. Each wagon has its own HP bar — let it burn and every defender on it is lost, enemies march through the husk, and your merge space shrinks. If the locomotive falls, it's game over. PATCH & PREP BETWEEN WAVES The train never stops. Between waves, spend scrap on: Repairs to restore wagon HP Armor plates & spikes to harden defenses New wagons for more merge space Locomotive upgrades -> HP, ram, speed One-shot abilities -> airstrike, shield burst, EMP WASTELAND ENEMIES Raiders flanking on motorcycles Climbers boarding and marching for the engine War-rig brutes crashing through armor Drones flying straight for the locomotive Swarms that overwhelm by numbers Unique bosses on every route KEY FEATURES Deterministic merging — strategy over RNG Dual-phase gameplay: combat + upgrade shop Dramatic loss spirals — every cell matters No forced timers — you choose when to trigger the next wave Portrait, one-handed, 2–5 minute runs The rails stretch on. The horizon is on fire. Patch your wagons. Prep your crew. Keep the train moving because stopping means dying. Download Steam & Bullets. Defend the rails. ## Version history (last 3 releases) ### 0.0.3 — 2026-08-14 NEW IN THIS UPDATE Five Worlds to Conquer The journey now spans five distinct worlds, from the desert frontier to burning lava fields and ruined cities, each with its own enemy roster and difficulty curve. Dozens of New Levels Worlds 2 through 5 add 18 hand-tuned levels, plus rebuilt early levels with new boss finales. New Lobby Swipe through the worlds in the new lobby carousel and track your progress across the whole campaign at a glance. In-Battle Unit Upgrades Spend mana mid-wave to boost the damage and fire rate of any defender type you have on the field. A new tutorial step walks you through it on your first run. Critical Hits and Damage Numbers See exactly how hard you are hitting with floating damage numbers and satisfying critical hit feedback. Balance Pass Reworked wave scaling, coin and mana rewards, spawn costs and boss pacing across the campaign. Later worlds now offer a genuinely stronger roster than World 1. Fixes and Polish - Bosses can no longer be permanently frozen or held off the train - Knockback no longer locks enemies in place - Fire rate upgrades no longer round down and get lost - Locomotive now shows its armor bar - Wagon health bars hide correctly when a wagon is destroyed - Many UI, shop and tutorial fixes ### 0.0.2 — 2026-08-03 Six new defenders to command. The Blaster knocks enemies clean off the train with a sonic cone, the Freezer locks them in place with ice, the Poisoner melts them slowly with toxic splash, the Thunderer chains lightning between targets, the Trapper scatters traps along the ground, and the Melter leaves burning acid puddles behind. Build your own squad. You now choose which defenders ride with you into battle. Swap units in and out from the Defenders screen and take the loadout that fits your playstyle. The Evolution Track is here. Earn XP from every match and spend it on permanent perks that make your train, your heroes and your economy stronger run after run. Pick your power mid battle. Level up during a fight and choose from a deal of upgrade cards to shape each run on the fly. New enemies and five new bosses. Face the Sapper, the Grappler, the War Chief and the Pig Brute, then survive the Juggernaut, the Lich King, the Warlord, the Steam Titan and the Zeppelin, each with fully animated attacks. Better rewards. Wins pay out card bundles with new celebration effects, and losing a level now grants consolation cards and XP so no run is wasted. Rebuilt early levels. Levels 1 to 5 have been redesigned with a smoother enemy introduction curve, per level bosses and a fully retuned difficulty. Fixes and polish. Knockback no longer freezes enemies or holds bosses away from the train, the Mega Laser hits harder and no longer stalls the game, armor and health bars display correctly, the shop gives clearer feedback, and dozens of smaller UI and balance issues have been cleaned up. Thanks for playing. Keep the train running. ### 1.0 — 2026-05-06 No release notes. ## More apps by Rodrigo Laiz - [Stack Flow 3D](https://appshunter.io/ios/app/stack-flow-3d/id6760356059) All apps by Rodrigo Laiz: https://appshunter.io/developer/1884082694 --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-17.*