▲
2
▼
In the Halloween-themed unlockable level Haunted Heights Zone, one of the enemies present in the level is the Cacolantern. These enemies are a direct reference to the Cacodemons from Doom, which is notable as Sonic Robo Blast 2 is a modification of the Doom Legacy source port.
Sonic Robo Blast 2 - Haunted Heights Zone:
https://www.youtube.com/watch?v=M-JpsAzCU_Q
Sonic Robo Blast 2 wiki page:
https://wiki.srb2.org/wiki/Cacolantern
https://www.youtube.com/watch?v=M-JpsAzCU_Q
Sonic Robo Blast 2 wiki page:
https://wiki.srb2.org/wiki/Cacolantern
▲
2
▼
In Greenflower Zone Act 1, there is a house in the upper section of the level next to a lake. If the player has all 200 Emblems, this house will have a note on it thanking the player for keeping the game alive.
This house belongs to the in-universe persona of RedXVI, an old member of the Sonic fangame community who had significant influence over Sonic Robo Blast 2's development.
The location of this note is a reference to Version 1.09 of the game, where an Easter egg was hidden on the very same house. In this version, jumping on the house would cause RedXVI to come out and send the player to an early work-in-progress version of Red Volcano Zone Act 1 if the player jumped on the house repeatedly after beating the game three times.
This house belongs to the in-universe persona of RedXVI, an old member of the Sonic fangame community who had significant influence over Sonic Robo Blast 2's development.
The location of this note is a reference to Version 1.09 of the game, where an Easter egg was hidden on the very same house. In this version, jumping on the house would cause RedXVI to come out and send the player to an early work-in-progress version of Red Volcano Zone Act 1 if the player jumped on the house repeatedly after beating the game three times.
Sonic Robo Blast 2 - Creepy House:
https://www.youtube.com/watch?v=GBSVtjWZDPY
Sonic Robo Blast 2 wiki page:
https://wiki.srb2.org/wiki/RedXVI#Version_1.09
https://www.youtube.com/watch?v=GBSVtjWZDPY
Sonic Robo Blast 2 wiki page:
https://wiki.srb2.org/wiki/RedXVI#Version_1.09
▲
1
▼
In Deep Sea Zone Act 1, there is a series of buttons which require the player to backtrack through parts of the level. After pressing three specific buttons, a path will open up near the start of the level, leading to a room with an animated portrait of Cirno from the Touhou Project franchise.
Cirno cameo:
https://www.youtube.com/watch?v=yJ9HDDublfY
Sonic Robo Blast 2 wiki page:
https://wiki.srb2.org/wiki/Deep_Sea_Zone_Act_1
https://www.youtube.com/watch?v=yJ9HDDublfY
Sonic Robo Blast 2 wiki page:
https://wiki.srb2.org/wiki/Deep_Sea_Zone_Act_1
Related Games
Gothic II
Woody's Incredible Journey to the Escape from Eternal Terror
Smite
ESPN National Hockey Night
Crash Bandicoot 4: It's About Time
Hitman: Contracts
Carmageddon: Reincarnation
Grand Theft Auto IV
Art of Fighting
Max Payne
The Invincible
Dead Island
Adventure Time: Explore the Dungeon Because I Don't Know!
Stranger of Paradise: Final Fantasy Origin
Space Quest: The Sarien Encounter
Pillars of Eternity
Spore
PGA Tour 96
World of Warships
Monsters vs. Aliens
Garten of Banban
Transformers: Fall of Cybertron
Jack Jeanne
Alan Wake
Kowloon High-School Chronicle
Fantasy Earth: Zero
Yume Nikki
Homeworld
Pokémon Go
RollerCoaster Tycoon 3
Goosebumps HorrorTown
Driver: San Francisco
LEGO Star Wars III: The Clone Wars
Purrfect Apawcalypse
Oddworld: Soulstorm
FIFA Soccer 97
The Legend of Dragoon
Ni no Kuni II: Revenant Kingdom
Twisted Metal
Monopoly Go!
Five Nights at Candy's 2
Disney's The Emperor's New Groove
Old School RuneScape
Outlaws
MapleStory
Deal or No Deal
Metal Gear Solid
Gods Eater Burst
The Incredibles
Shogo: Mobile Armor Division