BUNNYBastion How to Unlock Upgrades — Complete Guide

This BUNNYBastion how to unlock upgrades guide covers both the roguelike upgrade system between waves and the permanent progression tree that carries across runs. BUNNYBastion uses a dual-layer upgrade system: temporary power-ups chosen at the end of each wave that shape your current run, and permanent upgrades purchased with currency earned from completed runs. Understanding how these two systems interact is the key to turning early failures into consistent late-game victories.

Roguelike Upgrade System

After each wave you clear, the game presents three random roguelike upgrades to choose from. These are temporary — they last only for the current run but are often run-defining. Categories include attack modifiers (increased projectile count, elemental damage, knockback), defensive upgrades (shield capacity, damage reduction, regeneration), and utility options (faster reload, wider attack arc, resource bonuses). The pool of available roguelike upgrades expands as you unlock permanent upgrades, meaning your mid-run choices become more varied and powerful the more you play. Strategic selection is critical: stacking upgrades in one damage type can create powerful synergies, while spreading picks too thin often leads to underpowered clear attempts.

Permanent Upgrades and Currency

To understand how to unlock upgrades permanently in BUNNYBastion, you need to know about Merit Points — the currency earned at the end of each run based on waves cleared, enemies defeated, and bonus objectives. Merit Points are spent in the Bastion Upgrade menu between runs. This permanent progression tree includes stat boosts (health, attack damage, attack speed, shield capacity), hero-specific skill enhancements, and unlockable starting bonuses that apply every run. Each permanent upgrade has multiple levels with escalating costs, so prioritizing key stats early yields the most noticeable improvement to your clear rate. The first few levels of most upgrades are cheap, encouraging broad investment before specializing.

Best Upgrades to Prioritize

When figuring out how to unlock upgrades efficiently in BUNNYBastion, prioritize these permanent upgrades first: Bastion Shield Capacity (+health), Attack Speed, and starting Currency Bonus. These three provide the strongest early power spike and make subsequent runs faster, earning more Merit Points per minute. For roguelike upgrades during a run, prioritize projectile count increases and elemental damage modifiers — they compound multiplicatively with attack speed upgrades. Avoid defensive roguelike picks early in a run unless you are playing the Vanguard, since killing waves faster is the best defense in BUNNYBastion's fast 10-minute format.

Unlock Progression Milestones

There are key milestones in the permanent progression system that change how you play. Reaching 10 total permanent upgrade levels unlocks the second hero. Reaching 25 unlocks a starting equipment slot, letting you begin runs with a bonus item. At 50 total levels, you unlock the ability to see the next wave composition before choosing your roguelike upgrade, which is a massive strategic advantage. These milestones make it clear that learning how to unlock upgrades steadily through regular play is the intended experience — BUNNYBastion rewards consistent runs over grinding a single strategy.