History VideoGame / RiskOfRain2

** The Lost Seer's Lenses from ''Survivors of the Void'' replaces all Lens-Maker's Glasses to grant a chance to instantly kill non-boss enemies on hit.[[note]]"Non-boss enemies" in this case includes randomly spawned enemies that ''can'' spawn as bosses - if a Grandparent spawns as part of the teleporter event, the Lenses can't kill it, but if it spawns randomly, they can. Bosses, in this context, are monsters with red health bars.[[/note]] As a trade-off for this monstrously powerful effect, it requires a whopping ''200 stacks'' to make it a guaranteed chance, compared to a mere ten for the Glasses.
*** However, in practice, it requires far fewer Lenses than that to kill almost all enemies quickly, since the insta-kill chance is re-rolled separately for ''each hit'', and that's not even getting into the fact that it's also affected by items that affect luck. Possessing 20 Lenses by themselves would result in a 10% chance for ''each hit'' to insta-kill enemies. Possessing 20 Lenses and one 57-Leaf Clover would raise that chance to 19%. Adding another Clover would provide a 27.1% chance; a third yields a 34.39% chance; and so on. (The corollary of this is that Purity will worsen the same chances.) Although Clovers are rare items, there are relatively painless ways to get them reliably, too - see LethalJokeItem below. The Lenses' main downside for most characters is the loss of the Harvester Scythe's reliable healing from guaranteed critical hits, but sometimes the best defense can be a good offense. (The survivors who are least likely to miss this are the Railgunner, who doesn't see an increased critical hit chance from the Glasses anyway; Bandit, who can get guaranteed critical hits by attacking enemies from behind; and Loader, whose primary attack provides her a temporary barrier.)

* NonStandardGameOver: If you manage to loop the game and reach at least Rallypoint Delta, Scorched Acres, or Sulfur Pools, [[spoiler:a celestial portal opens up and leads to an obelisk that the player can interact with to obliterate themselves, ending the run. This is required to unlock the Mercenary, and it also nets you 5 Lunar Coins for doing this]]. [[spoiler:If you also have the Beads of Fealty in your inventory, the obelisk instead takes you to a different area containing one of four BonusBoss Scavenger variants, and killing it rewards you with 10 Lunar Coins and the game fades to black. The results screen at the end for either end says you were "killed by the Planet" and your "Fate unknown...".]]

* VersionExclusiveContent: Sundered Grove was initially exclusive to the UsefulNotes/GoogleStadia version of the game for a brief 4 months after release.

** The Plasma Shrimp plays it straight. It grants a shield that, as long as it's intact, causes the player to fire a homing missile on each hit. This naturally adds up with a high fire rate, though it only functions if you can avoid taking too much damage or have another shield as a buffer.

** The Plasma Shrimp plays it straight. It grants a shield that, as long as it's intact, causes the player to fire a homing missile on each hit. This naturally adds up with a high fire rate, though it only functions if you can avoid taking too much damage of have another shield as a buffer.

* GoombaStomp: The [[XtremeKoolLetterz H3AD-5T]] v2 lets you jump higher and gives you the ability to slam down on top of enemies to damage them. It scales with height, so if you go up far enough, you can easily one-shot bosses with it.
* GradualRegeneration: All characters are given innate regenerating health to compensate for the inability to see every enemy and incoming attack in a 3D space. A character's regeneration rate is increased on Drizzle, but reduced on Monsoon. Cautious Slug strengthens it while out of combat, and the Bustling Fungus takes it a step further and offers significant regen in a small aura as long as you're standing still ([[SimpleYetAwesome or are one of Engineer's turrets]]).

* GlassCannon

** The Artifact of Glass makes a return from the first game, which makes you and all allies have only 10% of their health, but five times as much damage. It also removes the LastChanceHitpoint that would ordinarily activate if the player is hit with an attack that does 90% damage and changes Infusion to require 10 kills per hitpoint gained.

** The Artifact of Glass makes a return from the first game, which makes you and all allies have only 10% of their health, but five times as much damage.

** The AT-1 Missile Launcher [[SubvertedTrope Subverts it]], as it only has a 10% chance to fire a single, powerful missile, and stacks just make the missile bulkier, rather than adding more of them. Getting it to fire repeatedly requires items that either increase the proc rate (57-Leaf Clover) or a high rate of fire to increase the likelihood of triggering the effect.

On November 6th, 2023, a mysterious DLC expansion under the name "EXXXXXXX-X" was unveiled and was teased in-game via the appearance of floating blue meteorites across the game's various stages. This was revealed on November 8th, 2023 to be the game's second expansion pack, ''Seekers of the Storm'', which will add an additional wave of new stages, bosses, Survivors, items, and collectables.

On November 6th, 2023, a mysterious DLC expansion under the name "EXXXXXXX-X" was unveiled and was teased in-game via the appearance of floating blue meteorites across the game's various stages.