TerraTech Legion Storms Game Pass on April 30

A bullet heaven game where you build your own vehicle out of modular blocks, then ram it through swarms of rogue AI bots at terminal velocity. On paper, TerraTech Legion sounds like the kind of gloriously unhinged indie pitch that either clicks immediately or gets scrolled past entirely. Publisher Mythwright and developer Payload Studios confirmed the game launches April 30 on Xbox Series and PC via Steam, Epic Games Store, and Microsoft Store, with day-one availability on Game Pass.

That Game Pass inclusion is doing a lot of heavy lifting here. TerraTech Legion sits at the intersection of roguelike, bullet heaven, and physics-based vehicle builder, which is a combination so specific that most players won't know they want it until they've tried it. Getting it in front of millions of subscribers on launch day removes the biggest barrier a game like this faces: convincing someone to spend money on a concept they can't easily picture. I think this is one of those cases where Game Pass works as intended for both sides. Players get a zero-risk way to try something weird, and the developer gets eyeballs they'd never earn through store visibility alone.

What You're Actually Building

The core loop has you assembling a vehicle from block components, including wheels, boosters, chainsaws, and orbital lasers, then driving that creation through waves of hostile bots across AI-infested planets. Your building choices directly affect how the vehicle handles thanks to physics-based movement, so strapping six orbital lasers to a chassis with one wheel presumably has consequences. Between waves, you rebuild and augment at mobile Upgrade Pods, discover new blocks from destroyed enemies and outposts, and unlock specialized corporations that push different build strategies. GeoCorp favours bulk and power, Venture goes fast and light, and Hawkeye Systems leans into advanced weaponry.

It's a structure that borrows from Vampire Survivors and its countless imitators, but the vehicle-building layer gives it something those games don't have. Instead of picking upgrades from a menu, you're physically constructing the thing that fights. Whether that added complexity makes the game better or just slower is the question I can't answer from a trailer, but the concept has more personality than most entries in the bullet heaven space right now.

The broader pitch involves clearing planets of Legion factories and outposts, fighting boss mechs that guard them, and eventually taking on a planetary overlord to purge each world. Multiple biomes with unique terrain challenges and rewards round out the run structure. Payload Studios previously developed the original TerraTech, a sandbox vehicle-building game that carved out a small but dedicated community, so the building system here isn't coming from nowhere.

What makes this interesting as a Game Pass launch specifically is the contrast with how most indie games in this genre find their audience. Bullet heaven titles typically live or die on Steam word-of-mouth and streamer pickup. They're cheap, they're immediately readable in a clip, and they spread virally or they don't. TerraTech Legion is harder to sell in a five-second clip because the vehicle building adds a layer that needs hands-on time to appreciate. Game Pass gives it that runway.

TerraTech Legion launches April 30 on Xbox Series and PC, with Game Pass access from day one across both platforms.