# 100days | HD-2D Roguelike Auto-Battler with 6 Weapons and 300+ Elemental Combos

> 100days is an HD-2D roguelike auto-battler. Equip six weapons at once, combine elemental tags for 300+ effects, and survive endless days. A

Release date: 2026-10-16
Tags: casual, relaxing, singleplayer, roguelike, incremental, bullet-hell, idler, roguelite
Source: https://store.steampowered.com/app/4373030/
Article page: https://web-autoai.com/articles/100days-an-hd-2d-roguelike-auto-battler-with-300-elemental?lang=en

Prices and ratings change over time — check the article page for the current values.

---

## Overview

100days is a compact but surprisingly deep roguelike auto-battler that launched on Steam on October 16, 2026. Developed and published by the duo CeciliaR and 白天, this paid title blends the visual charm of HD-2D graphics with the strategic chaos of bullet-hell combat. The core loop is simple: survive endless days, each one throwing stronger enemies at you, while you build a loadout that can keep up.

## Highlights

- **Six Simultaneous Weapons**: Equip up to six weapons that all fire at once, creating a dense, bullet-hell-style screen presence that feels both overwhelming and satisfying.
- **300+ Elemental Effects**: Combine elemental tags on your weapons to trigger a huge variety of combat effects. The description promises over 300 possible interactions, meaning every run can feel genuinely different.
- **Roguelike Progression**: After each level, you pick one of three upgrades. This simple choice system, combined with the endless-day structure, encourages experimentation and replayability.

## Who It's For

If you enjoy idle-adjacent games that still require tactical thinking, or if you like roguelites where builds emerge from small decisions, 100days is worth a look. The auto-battler format means you can watch your setup unfold, but the bullet-hell density keeps you engaged. It's also a good pick for players who want a relaxing yet strategic experience—the game is tagged as Casual and Relaxing, so it's not about twitch reflexes.

## Game Info

- **Genre**: Casual, Relaxing, Singleplayer, Roguelike, Incremental, Bullet Hell
- **Developer/Publisher**: CeciliaR, 白天
- **Release Date**: October 16, 2026
- **Modes**: Singleplayer (with some Steam features listed, but core is solo)
- **Languages**: Simplified Chinese, English, Japanese, Korean
- **Price**: Paid title (check the latest Steam listing for current pricing)

100days is a fresh take on the auto-battler formula, packing a lot of variety into a seemingly simple package. If you're curious about how six weapons and elemental tags can create hundreds of combinations, this is a game that invites you to lose track of time—one day at a time.