Upon walking over an ammo pickup it has a split 50% chance of giving ammo to either primary or secondary weapon. This is a flat 50% and does not change based on the ammo levels of each weapon.
However, if a weapon is full on ammunition or is an ammoless melee it will give an equal chance of giving the other 5 ammo types.
So if running two weapons and the primary weapon is short on ammo, but the secondary weapon is full on ammo or is ammoless melee, then it's a 60% chance to get the desired ammo type. (50% primary + 10% secondary picking from 5 ammo types)

• 32 Bullets
• 8 Shells
• 7 Bolts
• 6 Explosives
• 10 Energy

Ammo drops will be sucked in by the player if walked within proximity of them. They will despawn if not picked up within a certain amount of time, blinking before despawning. This time scales with loop.

If the player is carrying two cursed weapons then ammo drops will have a 50% chance to become a cursed ammo drop instead.

These give 1.5 times more ammo than a normal ammo pickup, but will despawn 3 times faster than a normal pickup.

Cursed ammo pickups will despawn if not picked up within a certain amount of time, blinking before despawning. This time scales with loop, and upon despawning these will cause a small explosion which can hurt both the player and enemies if close enough.

These pickups do not have a pickup range unlike normal ammo pickups, and must be directly walked over in order to collect. This means that these are unaffected by plutonium hunger or exit portal pickup attraction. (Eyes telekinesis does work on the other hand).

Ammo chests are the default ammo chest variation. It has a chance to be replaced with a Present or IDPD Chest, but is guaranteed to appear on 7-3 specifically.

If a portal opens in proximity of an ammo chest and causes it to open, it will instead spawn two ammo pickups which will instead follow normal ammo pickup rules.

Upon opening this chest it will grant 1.5x more ammo of a normal ammo chest, or 3 normal ammo pickups worth. However, it will only grant a random ammo type that's not the players current primary or secondary held weapon.

In order to circumvent this, the player can simply swap out one or both of their weapons with different ammo types that they don't want from the Present Chest, and only then open it. There would still be a 33%/66% chance of receiving the desired ammo type, but can be worth the small detour.

If a portal opens in proximity of a present chest and causes it to open, it will then behave like a normal ammo chest and spawn two ammo pickups which will follow normal ammo pickup rules.

Ammo/Present chests normally will give ammo directly to the player, however the IDPD Chest will directly drop 5 ammo pickups directly on top of the player. That difference means that it will randomly give ammo for the primary and secondary weapon, rather than just the primary, so it doesn't matter what weapon is held when walking over these chests.

Upon opening the chest it will summon an IDPD ambush, where 4 blue portals will appear spawning in IDPD units. IDPD chests can be opened after the exit portal has already spawned, meaning that it can spawn enemies that are not required to be killed in order to progress. The exception to this is if there is a vault portal currently opened, no IDPD will spawn upon opening the chest.

Any weapon, whether dropped by an enemy or from a weapon chest, will give 2 ammo pickups worth of its own ammo type upon walking over it the first time.

If an exit portal opens in proximity of a weapon chest and causes it to open, the weapon will pop out and if close enough will be sucked into the portal. There are some rare situations that the weapon chest is opened in a spot where neither the weapon can get sucked into the portal, nor the player can reach it.

Big weapon chests act the same as normal weapon chests do, the difference being that 3 weapons will spawn instead of 1.

Cursed chests pull from a drop pool that is two difficulties above the players current. This means that there is a chance to find better weapons sooner, until the drop pool is filled out in early loop. Additionally weapons from 1-1 cannot appear in the cursed drop pool increasing the odds for better weapons.

Weapons that are cursed cannot be swapped for non-cursed weapons, only other cursed weapons. Having two cursed weapons will cause cursed ammo pickups (see above) to spawn.

An in-depth guide to all the cursed mechanics can be found here.

Opening the proto chest the first time will yield the rusty revolver which is exclusively found here. This weapon can be swapped out with any weapon the player is carrying, and the weapon left behind will now be stored inbetween runs.

The next time the proto chest is opened the stored weapon will be awaiting the player, which can then be swapped out with any new weapon being held. The stored weapon will be transferred between runs regardless of gamemode; with the exception of dailies which will always show a rusty revolver by default for a level playing field.

While exit portals will automatically open any chests within proximity, proto chests are the exception and are unaffected. However if the player walks over the chest, the weapon within it will get sucked into the portal. The next time the proto chest is visited, it will once again contain a rusty revolver as there was no weapon left inside.

Enemies will only drop ammo pickups, however there is a chance that ammo pickups can be converted to health pickups based on the players current health. So the less HP the player has, the more likely that ammo will become health drops instead; this also means that being low on ammo can boost chances of finding health quicker.

(Put exact health conversion tech here later)

These pickups will give the player 2 HP, though their health cannot exceed their max HP.

Health pickups will be sucked in by the player if walked within proximity of them. They will despawn if not picked up within a certain amount of time, blinking before despawning. This time scales with loop.

Odds of a health chest do not increase the lower the player's health is at, it's simply a flat 50% if under half health.

This means for optimally safe health chest spawning:
If max HP is 8, then starting a level at 3 HP is the most optimal for health chest spawns.
If max HP is 12, then starting a level at 5 HP is the most optimal for health chest spawns.

If a portal opens in proximity of a health chest and causes it to open, then the 2 health pickups will then pop out and be attracted to the player.

Each rad is equal to 1 experience point and is dropped by most enemies, with a few exceptions such as the IDPD.

Rads dropped from enemies can be collected by walking within proximity of them, where they will be automatically sucked up by the player. If not picked up within a certain amount of time, the rads will start to blink away then despawn.

The range for rads to be sucked up by the player is far greater than that of ammo/health pickups, but adversely will also start to despawn much sooner. This time scales with loop.

There's a few methods that rad cans can be destroyed, that being;

• Simply walking over the rad can will instantly break it.
• Any damage source from the player can break it.
• Exit portals opening will break nearby rad cans.
• Any sort of enemy projectile can break rad cans.
• Specific enemies that deal melee can break rad cans, but not universal.
• Most common is any palace enemy, which makes rad cans common to miss on 7-1 and 7-2.

If a big radiation canister is skipped then it will result in Hostile Horror spawning(link later). This enemy appears only once per run, so any rad cans skipped thereafter will just result in further big rad cans spawning.

While health chests have a chance to replace rad canisters, skipping one does not count as a missed rad can and will simply result in missed health if missed. If a rad canister is skipped and a health chest spawns the next level, the big rad can will simply be delayed until it can next spawn.

Two rads cans are equal to 50 rads while a big rad can is 45 rads, so skipping a rad can results in a net loss of 5 rads and usually isn't worth it. Spawning Hostile Horror can result in a net gain of up to 40 rads against 3 rad canisters normally opened, but is a high risk strategy that isn't worth the yield in most situations.

Upon opening they will burst into 20 Radiation Maggots(link later) that each drop 2 radiation each for a total of 40 rads gained. Rad Maggots will take contact damage from the player even without gamma guts, so walking over the infested rad can will cause all 20 Rad Maggots to die instantly while only causing the player to take 1 damage from it.

(Check conditions for level end later)

There is no benefit to skipping portal strike canisters. Hostile Horror cannot spawn on Rogue's runs specifically.

Unlike normal rad canisters, Rogue's portal strike canister behaves like normal chests where the only way to open it is by walking over it or being opened by an exit portal.

Only appears when an exit portal opens near a portal strike canister, causing this to spawn from it.

Present Chests will appear visually but will give each ammo type regardless. IDPD Chests behave as normal.

If an exit portal opens one of these chests it will behave like a normal chest instead, only granting two normal ammo pickups.

Appears when taking Ambidextrous as Steroids, weapon chests will be replaced with this special variant. It will contain two of the same weapon, and thus will also give ammo for both of those weapons.

Big chests look the same but will give 3 random weapons and include a 4th weapon that will match one of the weapons in the chest.

Appears when taking Ambidextrous as Steroids, having the same properties as above but will have the same two cursed weapons within it instead.

Health chests always appear normally in Pizza Sewers, however when Fish runs his ultra Confiscate, these pizza chests have a chance of spawning into the level or dropping from enemies but only within this area.

These have the same properties that normal health chests do, healing for 4 HP.

YV's Crib is an area only accessible by reaching ultra as YV, so is specific to him. Two of these giant chests spawn and each contain 24 weapons for a total of 48.

The weapon drop pool pulls from 6 difficulties higher than what would normally be seen. This means that if ultra is reached on 7-1 or later, these chests will contain every possible weapon in the drop pool.

Similarly can only spawn in YV's Crib, but will appear specifically if running Crown of Love as it forces only ammo chests to spawn.

Two of these will spawn each containing 24 ammo pickups. This is largely to punish the player for running crown of love and can be viewed as a joke chest, as giant weapon chests will most certainly fill ammo on top of giving plentiful weapon options.

If the player somehow manages to be carrying two cursed weapons, cursed ammo pickups will in fact spawn from the chest as well.

Clam chests are a weapon chest variation that appears specifically in the oasis, but functions identically.

Other weapon chest variants will spawn in as normally with their typical sprites.

Pizza box is a prop that appears exclusively in the Pizza Sewers. When being broken it has a 20% chance to drop a pizza slice pickup.

Pizza slice is a health pickup variation that appears specifically in the pizza sewers, any health drop will appear as a pizza slice instead. It functions identically, giving 2 HP when picked up.

Gold chest is a special chest that only appears on YV's mansion. It will replace the normal weapon chest and is guaranteed to appear, no weapon chest variant will take its place.

Will only give a random golden weapon upon opening, from a pool of 6 in preloop. That being golden machinegun, shotgun, crossbow, grenade launcher, laser pistol and wrench.

In loop any of the 12 normal golden weapons have a chance to appear within the gold chest.

A special variant of the big weapons chest that only spawns within the Cursed Crystal Caves. It functions the same as a big chest does but will give 3 cursed weapons instead.

As like cursed chests, 1-1 weapons cannot appear in the cursed big weapon chests drop pool, however it can also pull from 3 difficulties higher instead of 2. That means that in preloop it can include weapons usually only found in labs/early palace depending on the players current difficulty.