C64 Awesome SlamSibs Infinite

Play 'Awesome SlamSibs Infinite' on C64 online.

Awesome SlamSibs Infinite game data

Commodore 64 game name: Awesome SlamSibs Infinite | Release date: 2026 | Publisher: Søren Trautner Madsen | Game media type: crt | Language: en
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About Commodore 64 Awesome SlamSibs Infinite

Awesome SlamSibs Infinite is a Super Smash Bros.–style platform fighter for the Commodore 64, made by Danish developer Søren Trautner Madsen and released on 25 October 2026 at the Zoo 2026 party. Up to two players knock C64 and Nintendo legends off six classic-game stages, with 15–20 moves per fighter squeezed out of a single-button joystick. It is a free, non-commercial fan tribute, and you can play it right here in your browser.

Quick facts

• Genre: platform fighter / brawler (Smash Bros. style)
• Code: Søren Trautner Madsen, with Jesper “Trap” Larsen (menu system)
• Released: 25 October 2026, Zoo 2026 party
• Players: 1 player vs. CPU or 2 players head-to-head
• Controls: one-button joystick (both ports for 2 players)
• Format: 1 MB EasyFlash cartridge (.crt), so it loads instantly
• Price: free fan game, not for sale

What is Awesome SlamSibs Infinite?

Think Super Smash Bros. Ultimate, rebuilt from scratch on an 8-bit breadbin. Instead of draining an energy bar, every hit raises your opponent’s damage percentage. The higher it climbs, the further they fly, until one well-timed smash attack sends them off the screen for good. You win by surviving, not by out-punching.

The game grew out of a technical challenge. Madsen had already ported Playdead’s LIMBO to the C64, and an online comment grumbled about its parallax scrolling. Madsen set out to prove that smooth, layered parallax was possible, and the fighting game was built around that routine. The manual even thanks “that bloke online” for the grumpy comment that started it all.

The project first surfaced as Awesome Slam Siblings in a 2022 preview and was renamed Awesome Slam Sibs Infinite for the 2023 preview. The full game, the 2026 release, adds a CPU opponent (added “begrudgingly”, says the manual), six stages and a complete scoring system.

Fighters

Every fighter is drawn with overlaid sprites for extra detail and has 15–20 unique moves:

• Turrikid: the armoured hero of Manfred Trenz’s Turrican, complete with his multiple-shot weapon.
• Rick D: the accident-prone adventurer from Rick Dangerous, fighting with his trademark bombs.
• Curvy: a pink puffball from Dream Land, deadly in the air.
• Ness: the EarthBound kid with a baseball bat and PSI powers.
• Plus Limboy, Pay-per-boy and Sir Boxershorts, who are best discovered in play.

Stages

Six arenas recreate classic games, each with parallax scrolling and its own music:

• Turrican’s World: mechanical platforms with Chris Hülsbeck’s Turrican music.
• Ghosts ‘n Goblins: graveyards and floating islands, with Capcom’s theme.
• Rick Dangerous: a trap-filled temple.
• Nebulus (Tower Toppler): a fight around the rotating tower, scored with Steve Turner’s Uridium tune and a guitar solo by Press Play On Tape.
• LIMBO: Madsen’s own monochrome C64 LIMBO world, played in silence.
• Battlefield: a clean arena with no hazards, where skill decides the winner.

How to play: controls

The game gets a full fighting-game move set out of one fire button. It tells a tap, a hold and a stick flick apart:

Playing in the browser: press START under the emulator. Joystick port 2 is on the cursor keys and port 1 is on W/A/S/D (see the keyboard mapping table below the emulator). A USB gamepad works best for flicks and smash attacks, and two gamepads make the perfect couch setup.

Scoring and lives

Against the CPU, each cleared level scores:

• Completion speed: 0–500 points.
• Level bonus: 100 × level number.
• Damage bonus: 1 point per % of damage dealt.
• Remaining lives: 100 points per stock left.

Lives do not refill between levels. Instead, you earn an extra life for every 1,000 points. High scores are saved to the cartridge.

Tips for winning

• Master one fighter first. With 15–20 moves each, depth beats variety.
• Keep moving. Standing still and trading blows loses. Use the platforms and control space.
• Shield and air-dodge. A well-timed dodge followed by a counter beats button mashing.
• Fight in the air. Launch with an up-smash, follow up and chain aerial attacks.
• Edge-guard. When your opponent is off-stage, intercept their recovery jump.
• Practise against the CPU, then invite a friend. The game was made for couch multiplayer.

Game manual

The official 19-page manual, written by David “Jazzcat” Simmons, covers every control, the fighters, the stages and the music credits: download the Awesome SlamSibs Infinite manual (PDF).

FAQ

Can I play Awesome SlamSibs Infinite online?

Yes. Press START in the C64 emulator on this page and the 1 MB EasyFlash cartridge boots instantly in your browser. Nothing to install.

Who made Awesome SlamSibs Infinite?

Søren Trautner Madsen (code, in-game graphics, music arrangements), with Jesper “Trap” Larsen (menu code), Jarkko “Sulevi” Salminen (menu graphics), Robert Wilson and Klaus Schneyder (additional graphics) and David “Jazzcat” Simmons (manual).

Is it a two-player game?

Yes. It was designed for two players side by side, one joystick each. A CPU opponent is included for solo play and practice.

Is Awesome SlamSibs Infinite an official Nintendo game?

No. It is a free, non-commercial fan tribute to Super Smash Bros. and to classic C64 games. The characters and music belong to their respective owners, and the game is not sold.

Does it need extra hardware on a real C64?

It runs from a 1 MB EasyFlash cartridge (or a compatible flash cart / Ultimate64). The manual mentions “a little REU love”: a RAM Expansion Unit unlocks an extra stage.

Credits

Code, in-game graphics, music arrangements: Søren Trautner Madsen
Menu system and additional code: Jesper “Trap” Larsen
Menu graphics: Jarkko “Sulevi” Salminen
Additional graphics: Robert Wilson, Klaus Schneyder
Manual and testing: David “Jazzcat” Simmons
Music sources: Chris Hülsbeck (Turrican), Ayako Mori (Ghosts ‘n Goblins), Steve Turner (Uridium), Brian Luzietti (Descent); level select and Battlefield themes by Madsen.

Release info: Awesome SlamSibs Infinite on CSDb. More modern C64 tributes: Lemmings Reloaded, Turrican II.

In order to play Awesome SlamSibs Infinite online, click on the start button located below the Commodore 64 emulator window.