Rounds of Rain

A ROUNDS-inspired survivor for Risk of Rain 2. Draft illustrated cards during a run to change how you shoot, move and block. Version 0.4.0 is an experimental public build.

Features

• 72 cards with complete wording and four rarities, shown as an animated card hand.
• Physical bullets with gravity, bounce losses, homing and ways to build toward a flatter sniper trajectory.
• Block, lifesteal, shotgun, thruster, demon, mine, returning-shot, orbit-storage, portal and grapple mechanics.
• Procedural character animation: walking, aiming, recoil, blinking, landing, charging and held-ammo poses.
• Restrained effects with limits on projectiles, stored ammunition, mines and cosmetic markers.

Playing

Install through a mod manager and select ROUNDS. Start a fresh run after installing or updating. Two initial draws, one draw per level and two per teleporter completion are the default. Open the card hand with F6, then select a card by clicking or using the displayed number keys. F7 controls portal placement/reset when a portal card is owned. The run continues while the hand is open.

The four skills are Shoot, Block, Hop and Overload. Card wording explains advantages and tradeoffs. Build-changing cards are generally unique; other cards can stack. Legendary cards become eligible after eight owned cards.

Co-op

Every player, including the host, must install this mod at the same version. Share the same mod profile for consistent dependency versions. Decks are personal; the server owns card choices and combat state. Portal Relay affects teammates' ROUNDS projectiles, not other survivors' hitscan attacks.

This package installs the survivor and required libraries. It does not install the creator's large personal modpack or its compatibility changes.

Balance and performance

Card-only damage, health and attack-speed bonuses are bounded; normal Risk items still apply. Pellets and echoes share damage. Lifesteal and kill healing share a per-second budget. Secondary projectiles cannot recursively generate more secondary projectiles. Projectiles are limited to 64 per owner and 256 globally; each owner can have eight mines and twelve stored orbit shots. Small cosmetic markers are also capped.

Current verification and known limits

3,635 automated checks passed, including stat calculations for every card pair, rarity/uniqueness, owner rules and projectile branching limits. Registration, embedded art decoding and network serialization passed in the game. All 196 direct references to the installed RoR2 assembly resolved.

Full startup tests of the large personal profile timed out after 150 seconds before the final character-catalog callback. Batch-mode tests also reported audio, UI and asset/shader errors. These results do not establish normal rendered startup compatibility. R2API reports a 1.4.1 target while the tested game reports 1.5.0.

Live combat combinations, rendered animation quality, multiplayer synchronization and long-run performance have not been verified by the agent. Test with a small fresh profile before adding a large modpack. Custom card decks persist through stages and respawns within a run; saving those decks across closing the game with ProperSave is not implemented.

Credits and disclosure

Unofficial fan mod inspired by ROUNDS. ROUNDS belongs to Landfall and Risk of Rain 2 belongs to its respective owners. No ROUNDS game binaries, extracted artwork or other mod binaries are included. Card/skill illustrations and the survivor presentation are authored for this project. The implementation and documentation were created with substantial AI assistance; the Thunderstore listing should carry the AI Generated category.

Card pool

Card	Rarity	Effect
Big Bullet	Common	+15% damage; +25% bullet size
Quick Shot	Common	+15% attack speed; +20% bullet speed
Tank	Common	+25% health; -10% move speed
Glass Cannon	Uncommon	+40% damage; -25% health
Shotgun	Uncommon	+2 bullets per shot; -15% damage
Bouncy	Common	+2 wall bounces; +15% bullet speed
Explosive Bullet	Uncommon	+2m splash radius; -10% direct damage
Vampire	Uncommon	+3% lifesteal; -10% damage
Fast Hands	Common	Block recharges 20% faster; +10% attack speed
Healing Block	Uncommon	Block heals 8% max health; -10% attack speed
EMP	Uncommon	Block releases a 200% damage shockwave
Ammo Cache	Common	+3 magazine capacity
Spray	Uncommon	+3 bullets per shot; -25% damage
Buckshot	Common	+1 bullet per shot; +5% attack speed
Super Sonic	Uncommon	+25% move speed; +10% jump power
Double Jump	Common	+1 air jump; +10% move speed
Regeneration	Common	+2 health regeneration per second
Steel Skin	Common	+10 armor; +10% health
Critical Hit	Common	+10% critical chance
Small but Deadly	Uncommon	+25% damage; +15% move speed; -10% health
Huge	Uncommon	+30% health; +10 armor; -15% move speed
Railgun	Rare	Faster, flatter bullets: double speed; -80% drop; +25% range; +40% damage; -25% attack speed
Bullet Storm	Rare	+5 bullets per shot; +3 ammo; -35% damage
Soul Harvest	Rare	Kills heal 3% max health; -20% gun damage
Ricochet	Uncommon	+4 wall bounces; +30% bullet speed
Bombardier	Rare	+4 metres splash radius; -15% attack speed
Leech	Uncommon	+4% lifesteal; -20% damage
Power Block	Uncommon	Block shockwave grows; block recharges 10% faster
Minigun	Rare	+75% attack speed; +6 ammo; -30% damage
Bullet Hell	Rare	+7 bullets; -20% damage; -10% attack speed
Planet Buster	Rare	+10m splash; -25% damage; -15% attack speed
Quantum Scatter	Legendary	+4 bullets; +3 wall bounces; homing; -35% damage
Black Hole	Legendary	Impacts pull enemies inward; +5m splash; -20% damage
Homing	Uncommon	Bullets seek enemies; -25% damage; -25% bullet speed
Unstable Reactor	Rare	Block deals 600% splash and heals 8%; block takes 25% longer to recharge
360 No Scope	Rare	Shoot in all directions; +7 bullets; -25% damage
Echo Chamber	Rare	Add one echo shot; shared damage; -10% damage
Pinball Wizard	Rare	+8 wall bounces; +75% bullet speed; -15% attack speed
Omega Leech	Rare	+6% lifesteal; +25% health; +2 regen; -25% damage
THE SUN	Legendary	+12m splash; triple bullet size; -35% damage; -30% attack speed; -15% health
Grow	Uncommon	Bullets grow in flight: up to +60% damage over 2s; -20% attack speed
Fragmentation	Rare	Hits spawn 3 fragments at 18% parent damage each; -20% gun damage
Splitting Rounds	Rare	Wall bounces spawn 2 side shots at 25% parent damage; -30% gun damage
Target Bounce	Rare	After hitting, redirect to 2 new enemies; lose 35% damage each hop; -25% gun damage
Thruster	Uncommon	Hits push enemies away; +350 knockback force; -20% damage
Demonic Pact	Legendary	Attacks spend 1% max health (cannot kill you); +2 bullets; +40% damage; -20% max health
Hive	Rare	Block arms the next volley: +6 strongly homing bullets; -20% gun damage
Parasite	Uncommon	Hits infect for 45% damage over 3s (one infection per target); +2% lifesteal; -20% direct damage
Scavenger	Rare	Hits return one ammo, at most every 0.4s; -15% gun damage
Teleport	Rare	Block blinks up to 6m along your aim; -15% max health
Saw	Rare	Block creates a 6m saw aura for 2s (300% damage/s); -25% gun damage
Wind Up	Uncommon	Hold Shoot to charge, then release; up to double shot damage; -25% attack speed
Boomerang Rounds	Uncommon	Bullets return after 0.8s. Catching refunds ammo (max 1 per 0.4s); -25% damage. Unique.
Mine Layer	Rare	After their bounces, bullets stick as mines. Block detonates yours; max 8. +20% reload time; -20% damage. Unique.
Orbital Magazine	Rare	Shoot loads up to 12 orbiting bullets; Block launches them. Holding ammo slows movement 20%; -15% damage. Unique.
Grapple Shot	Rare	Hits pull you toward enemies, at most once per 0.6s. -20% damage; -10% health. Unique.
Gravity Switch	Uncommon	Block reverses gravity on your airborne bullets for 2s; -20% bullet speed. Unique.
Bank Shot	Uncommon	Bullets cannot hurt enemies until a wall bounce. +1 bounce; +20% damage. Unique.
Mirror Pact	Legendary	Block catches up to 6 nearby enemy projectiles for your next volley. Protection shrinks to 0.18s. No beams/melee. Unique.
Portal Rounds	Legendary	First two surface hits place gates; later bullets warp through. F7 resets/repositions. Max 40m apart; -20% damage. Unique.
Return Ticket	Uncommon	Enemy hits turn bullets back toward you. Catching refunds ammo; -15% damage. Unique.
Tripwire Mines	Uncommon	Enable mine shots. Your armed mines trigger near enemies (3m); Block also detonates. -15% damage. Unique.
Slingshot	Rare	Enable grapple hits with an upward launch; +1 air jump; -20% health. Unique.
Portal Relay	Rare	Enable gates usable by teammates' ROUNDS bullets. +20m separation; -15% damage. F7 repositions. Unique.
Recall	Uncommon	Block recalls your airborne bullets and mines instead of detonating mines. Catch them for ammo; -15% damage. Unique.
Timed Charges	Uncommon	Enable mine shots that detonate 2s after sticking; Block can trigger them sooner. -15% damage. Unique.
Anchor Shot	Rare	Enable mines that stick to enemies as well as surfaces. Block detonates; -20% damage. Unique.
Ricochet Recharge	Rare	Wall bounces restore one Block charge, at most every 2s. +1 bounce; -25% damage. Unique.
Orbit Shredder	Rare	Enable orbit ammo. Held bullets damage nearby enemies (2.5m) twice per second; -20% gun damage. Unique.
Minesweeper	Uncommon	Enable mine shots. Your shots passing near your mines detonate them. Block also triggers; -15% damage. Unique.
Pinwheel	Rare	Enable orbit ammo; Block launches stored bullets in every direction. Holding slows you 20%; -25% damage. Unique.
Portal Snare	Rare	Enable portals and mine shots: send traps through gates, then detonate with Block. -30% gun damage. F7 repositions. Unique.