Faster Than Spire

Take FTL's Kestrel up the Spire.

Your deck is FTL's real weapons, crew and ship systems (Burst Lasers, Artemis missiles, Ion Blasts, beams, Mantis and Zoltan crew), with their numbers, art and sounds read from your own FTL install. Shields soak hits, slow weapons charge in your hand, and missiles run low. Act 1 is fought against Slay the Spire 2's Overgrowth monsters (Nibbits, Slimes, the Shrinker Beetle, Inklets, the Mawler and more), drawn from your own Slay the Spire 2 install with their own moves.

What's in it

• The Kestrel, a new character: 75 HP from FTL's hull, its real starting loadout (Artemis + Burst Laser II), FTL Shields and an 8-missile stock.
• 21 cards built from FTL data: 13 weapons plus crew and system cards. Damage, shots, cost (power), charge (cooldown), missiles, fire, breach, ion and rarity all come from FTL's blueprints.
• FTL rules in card combat: Shields (each layer stops 5 damage of a hit and recharges every turn, with the Kestrel's shield bubble shown while they're up), Charge, Missiles, Pierce, Fire, Breach, Ion, Beam and Bomb.
• Slay the Spire 2's Act 1: nine Overgrowth monsters in eight of its encounters, with their art, names, moves, intents, Shrink and Slippery powers, and the Slimed status card.

Requirements: Slay the Spire (Melty installs the mashup into it). FTL: Faster Than Light and Slay the Spire 2 installed through Steam (or set KESTRELSPIRE_FTL_DIR / KESTRELSPIRE_STS2_DIR). If either is missing, the main menu says so: without FTL the Kestrel isn't available, and without Slay the Spire 2 Act 1 uses Slay the Spire's own monsters. Single player.

No FTL or Slay the Spire 2 files are included; everything is read from your own copies when you play.

Credits: FTL: Faster Than Light © Subset Games; Slay the Spire and Slay the Spire 2 © Mega Crit. Bundles ModTheSpire and BaseMod (kiooeht, t-larson and contributors, MIT) and TwelveMonkeys ImageIO (Harald Kuhr, BSD-3-Clause). Mod code MIT. Built with Claude.