[{"data":1,"prerenderedAt":88},["ShallowReactive",2],{"game-onslaught-arena":3,"article-onslaught-arena":45},{"slug":4,"title":5,"description":6,"category":7,"subcategory":8,"tags":9,"thumbnail":14,"thumbnailAlt":15,"iframeUrl":16,"iframeWidth":17,"iframeHeight":18,"embedType":19,"developer":20,"developerUrl":21,"releaseDate":22,"lastUpdated":22,"popular":23,"difficulty":24,"controls":25,"features":34,"relatedGames":41},"onslaught-arena","Onslaught Arena","Strafe an arena as Xam in this twin-stick shooter, firing swords, spears, axes and fireballs in eight directions at waves of medieval monsters closing in.","Shooter","Arcade",[7,8,10,11,12,13],"Twin-Stick","Wave Survival","Fantasy","Boss Battles","\u002Fassets\u002Fimages\u002Fgames\u002Fonslaught-arena.svg","Onslaught Arena game thumbnail","https:\u002F\u002Farcade.lostdecadegames.com\u002Fonslaught-arena\u002F","100%","600","iframe","lostdecade","https:\u002F\u002Fgithub.com\u002Flostdecade\u002Fonslaught_arena","2026-07-08",false,"Medium",{"keyboard":26,"mouse":32,"touch":33},[27,28,29,30,31],"WASD — move","Arrow keys — fire in eight directions","K — swap which cluster moves vs fires","M — mute","F — fullscreen","Move the pointer to aim a reticle and hold the left button to fire toward it.","Not supported",[35,36,37,38,39,40],"Twin-stick arena combat with separate move and fire controls","Medieval weapon pickups: sword, daggers, piercing spear, axe, fire sword, magic fireball","Wave-based survival with named boss fights including the Gelatinous Cube, dragon, and Beholder","Enemies stream in from the arena edges: goblins, bats, cyclops, evil wizards, sandworms","Local persistent high score derived from waves cleared","Open-source HTML5 game under the GPL by Lost Decade Games",[42,43,44],"asteroids","alien-invasion","charge-beam",{"id":46,"title":5,"body":47,"description":6,"extension":80,"faq":81,"lastReviewed":22,"meta":82,"navigation":83,"path":84,"seo":85,"slug":4,"stem":86,"__hash__":87},"games\u002Fgames\u002Fonslaught-arena.md",{"type":48,"value":49,"toc":73},"minimark",[50,55,59,63,66,70],[51,52,54],"h2",{"id":53},"overview","Overview",[56,57,58],"p",{},"Splitting movement and aiming across two separate key clusters is the whole trick here. Onslaught Arena is a top-down, twin-stick-style arena shooter built in HTML5 by Lost Decade Games — programmer Geoff Blair, artist Matt Hackett, and composer Joshua Morse — and released under the GPL after debuting in Boing Boing's 2010 \"Games Inspired by Music\" competition. You play Xam, a seasoned fighter dropped into an arena while goblins, bats, cyclops, evil wizards, sandworms and worse pour in from the edges, and the only way out is through them. What separates it from a generic wave shooter is the medieval arsenal: the starting sword gives way to daggers, piercing spears, battle axes, and magic fireballs dropped as pickups, each with its own cooldown, range, and damage profile. Boss waves break up the swarm with named brutes — the Gelatinous Cube, a dragon, and the Beholder — and a local high score persists between runs, so chasing a personal best becomes the long-game hook once the weapon roster is muscle memory. It is built for fans of Robotron-style eight-way firing who want a fantasy skin instead of lasers.",[51,60,62],{"id":61},"how-to-play","How to Play",[56,64,65],{},"The goal is to survive as many waves as possible. By default, WASD moves Xam around the arena and the Arrow keys fire the equipped weapon in eight directions, so you can strafe one way while shooting another; press K to swap which cluster moves and which fires. A mouse works as an alternative: move the pointer to aim a reticle and hold the left button to shoot toward it. M mutes the audio and F toggles fullscreen. Weapon pickups drop from defeated enemies and auto-equip, changing your projectile's behavior — the starting sword for steady swings, fast daggers, a slow piercing spear, axes, and magic fireballs. Each wave telegraphs its name on entry, boss waves warn you in advance, and runs end when Xam's health reaches zero. Score is derived from waves cleared and saved locally as a high score. It is a keyboard-and-mouse game with no touch input.",[51,67,69],{"id":68},"tips-strategy","Tips & Strategy",[56,71,72],{},"Never stop moving. Enemies spawn at the arena edges and walk straight toward Xam, so standing still to line up shots is the fastest way to get surrounded — pick a strafe direction at the start of every wave and keep circling. Treat the move-and-fire split as the core skill: learning to walk south while firing north lets you kite the melee swarm while you pick off the real threats, since the wizards and demoblins that throw projectiles from range deserve to die before the harmless goblins crowding your feet. Match weapons to the job: the spear's slow cooldown pays off on single tanky targets because it pierces, while daggers shred dense bats with their fast two-knife spread. The Gelatinous Cube boss ignores every non-magical weapon, so grab a fireball or fire sword before its wave if one is lying on the ground. Hold some health in reserve for boss waves, because a single dragon or Beholder can end a strong run faster than the entire swarm that came before it.",{"title":74,"searchDepth":75,"depth":75,"links":76},"",2,[77,78,79],{"id":53,"depth":75,"text":54},{"id":61,"depth":75,"text":62},{"id":68,"depth":75,"text":69},"md",null,{},true,"\u002Fgames\u002Fonslaught-arena",{"description":6},"games\u002Fonslaught-arena","yLAxCW0xiOF4VPohSfmZHW3TQPXEnCPcWram0OL1Gz4",1783575110620]