Periastron Tower Defense crates serve as the primary summoning system used to unlock new unit cards in the Roblox tower defense game by Periastron Champions. Players purchase these crates in the lobby shops using either Coins (Gold) earned from matches and AFK sessions or Shards (Runes) accumulated through gameplay and codes. Crates reward unit cards of varying rarities, ranging from base defenders to rare, epic, legendary, and cosmic units.
Opening crates requires strategic currency management, especially because pity rules differ depending on which box you buy.
Crate Types and Currencies
Gameplay footage and shop interfaces confirm three primary crate types available in the game lobby:
| Crate Name | Primary Currency | Cosmic Pull Rate | Counts Toward Cosmic/Legendary Pity |
|---|---|---|---|
| Crate of Beginnings | Coins (50 coins per box at tutorial) | Standard pool | No |
| Crate of Nature | Coins / Gold | Standard pool | Yes |
| Fragmented Crate | Shards / Runes | ~1% base rate | Yes |
Crate of Beginnings
The Crate of Beginnings is the entry-level crate introduced during the game's initial tutorial stage. It costs 50 Coins for a single pull early in the game. While it provides an accessible entry point to build an early deck—awarding starter cards like Frostion and Swordsmen—it does not contribute toward high-tier pity progression.
Crate of Nature
The Crate of Nature is the standard mid-tier coin box. Players grinding story stages, medium difficulty, or endless modes regularly use accumulated gold to buy this crate in bulk. Openings from the Crate of Nature progress your in-game pity meter toward top-tier drops.
Fragmented Crate
The Fragmented Crate is sold through the Rune/Shard shop rather than the standard coin counter. It requires Shards (also referred to by players as Runes) to purchase. Player observations show a stated base Cosmic pull rate of approximately 1% (a 1-in-100 baseline chance) when opening Fragmented Crates.
How the Pity System Works
The game includes a dedicated pity counter to prevent bad luck streaks when rolling for high-tier towers. However, an official update introduced strict restrictions on which crates contribute to that progress:
- Exclusion of Beginner Crates: The developers explicitly set the Crate of Beginnings so that it does not count toward the Cosmic and Legendary pity counters. Opening beginner boxes will not build progress toward high-tier guarantees.
- Valid Pity Crates: To advance your pity gauge toward guaranteed Cosmics (such as the Necromancer card), you must open qualifying boxes such as the Crate of Nature or the Fragmented Crate.
- Pity Indicator: As you open qualifying crates, the lobby interface displays a visual pity tracker monitoring your progress toward guaranteed rarity thresholds.
Game Passes That Affect Crates
The official Roblox store for Periastron Tower Defense includes several game passes that directly impact crate acquisition, cost, and drop probabilities:
- VIP (319 Robux): Grants a permanent 20% discount on all box purchases in the shop, alongside 25% bonus EXP, 10% bonus AFK rewards, and a chat title.
- 1.3x Luck (299 Robux): Provides a flat +30% boost to overall pull luck across crate openings.
- 2x Coins (399 Robux): Doubles all coin earnings from gameplay, allowing players to purchase twice as many standard coin crates (such as the Crate of Nature).
- 1.5x Shards (399 Robux): Increases shard gains by 50%, speeding up the rate at which you can afford Fragmented Crates in the Rune shop.
Tips for Managing Crates and Currency
Because crate prices scale with volume and currency grinding takes time, prioritizing the right shop items helps optimize progression:
- Do Not Rely on Crate of Beginnings for End-Game Pulls: Since the Crate of Beginnings is excluded from high-rarity pity counters, stop buying beginner crates once you have a functional starter deck.
- Bank Gold for Crate of Nature Batches: Save coins until you can open crates in batches. This makes it easier to track pity thresholds without wasting currency across fragmented sessions.
- Utilize the AFK World: The built-in AFK World awards 200 coins every 300 seconds (5 minutes), providing passive income to fund bulk crate openings between active play sessions.
Frequently Asked Questions
What are the odds of pulling a Cosmic unit from a Fragmented Crate?
In-game shop listings for the Fragmented Crate display an approximate 1% base chance to pull a Cosmic-rarity unit.
Does the Crate of Beginnings build Legendary or Cosmic pity?
No. Official game patch notes specify that the Crate of Beginnings does not count toward the Cosmic and Legendary pity count.
How do I get a discount on crates in Periastron Tower Defense?
Purchasing the VIP game pass for 319 Robux provides a permanent 20% discount on all box purchases in the store.
