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OverRev

How do you defend an engine? over·rev (verb): to run an engine past its red line. FREE DEMO: OverRev is still in development. This demo has all four engines and 28 levels, and everything in it can still change. Tell us what you think in the comments! OVERREV is an 8-bit tower defense set inside a running engine. Dust, sand, rust, sludge and worse pour in through the intakes in one continuous stream. You bolt parts onto the floor around the engine and burn the dirt before it chokes it. FOUR ENGINES, SEVEN LEVELS EACH • ROTARY: three faces, one eccentric shaft, 300 bangs a second at 9,000 RPM. • INLINE-4: four pistons in a row, firing 1-3-4-2. • SUPERCHARGED V8: a blower on top and zoomie pipes that spit fire to a lumpy cross-plane beat. • RACING V12: twelve cylinders sixty degrees apart, screaming. Each engine is a full cutaway animation, and its sound is synthesised live from its own firing pattern. In slow motion the buzz breaks back into single booms. KEEP IT COOL A healthy engine runs near 190 °F, and every part runs off it, so every shot heats it up. Past 230 °F the housing glows and shakes and starts to smoke. Past 247 °F your parts starve of power. At 257 °F the coolant boils and the engine seizes. The build ring shows how much heat each part makes and how much a radiator takes away. Bolt on radiators, and hit the coolant vent (SPACE, or tap) to blow out a ring of steam that shoves the dirt back. FIVE PARTS • Spark plug: a fast zap that chains at level 3. Armour and oily dirt shrug it off. • Exhaust: a flamethrower. Fire burns straight through armour. • Turbo: an air pulse that slows everything around it. • Piston: a mortar shell that cracks armour. BANG! • Radiator: shoots nothing and keeps the engine alive. No part wins on its own: read what is coming and build for it. THE TUNING TREE Stars and cleared levels earn gears. Spend them in a branching tree of 49 upgrades: engine, cooling, fuel, and one branch for each part. Every branch ends in a keystone such as BACKFIRE, ARC WELDER, AFTERFIRE or CLUSTER SHELLS. Refunds are free, so try a build, then rebuild. FEATURES • 28 levels across 4 engines, each chapter ending in a boss. • No pauses between waves. Call the next one early for bonus fuel. • Bosses don't break on the engine: they hold on and grind until you kill them. • All pixel art and all sound made procedurally, in code. • Plays in the browser on desktop and on phones (landscape). CONTROLS Mouse / touch: tap an empty spot on the floor and pick a part from the ring around it. Tap a placed part to upgrade or sell it. Keyboard: Q W E R T pick parts (or fit one straight into an open ring). SPACE vents coolant. N calls the next wave. U upgrades, X sells, ESC pauses, F11 goes fullscreen. Made with <3 by DosBros Game Studio.