Steam Showdown

Steam is a 2D fighting game developed by Superbot entertainment, and published by Valve. It features characters from games popular on the Steam program.

Characters

 * Gordon Freeman (Half-Life)
 * Heavy Weapons Guy (Team Fortress 2)
 * Soldier (Team Fortress 2)
 * Pyro (Team Fortress 2)
 * Merasmus (Team Fortress 2)
 * Bill (Left 4 Dead)
 * Ellis (Left 4 Dead)
 * Tank (Left 4 Dead)
 * Chell (Portal)
 * GLaDOS/Atlas & P-Body (Portal)
 * Axe (Dota 2)
 * Drow Ranger (Dota 2)
 * Storm Spirit (Dota 2)
 * Batrider (Dota 2)
 * Maya (Borderlands)
 * Zer0 (Borderlands)
 * Gaige (Borderlands)
 * Krieg (Borderlands)
 * Terrorist (Counter-Strike)
 * Anti-Terrorist (Counter-Strike)
 * Wildcat (Alien Swarm)
 * Crash (Alien Swarm)
 * Alexander the Great (Rome: Total War)
 * Dovahkiin (The Elder Scrolls V: Skyrim)
 * Wilson (Don't Starve)
 * Clementine (The Walking Dead)
 * Vaas (Far Cry 3)
 * Ranger (Metro: Last Light)
 * Commander Shephard (Mass Effect)
 * Spiral Knight (Spiral Knight)
 * Isaac (The Binding of Isaac)
 * Vanguard (Chivalry: Medieval Warfare)
 * Misty (Call of Duty)
 * Ghost (Call of Duty)
 * Duke Nukem (Duke Nukem)
 * Crazy Dave (Plants VS Zombies)
 * Sam & Max (Sam & Max)
 * Bigby Wolf (The Wolf Among Us)
 * Serious Sam (Serious Sam)
 * Survivor (DayZ) (DLC)
 * Scout (Team Fortress Classic) (DLC)
 * Metro Police (Half-Life 2:Deathmatch) (DLC)
 * Demoman (Team Fortress 2) (DLC)
 * Ocram (Terraria) (Boss)

Gameplay
The gameplay would be similar to Super Smash Bros or Playstation All-stars Battle Royale, but with a few twists.

1: It utilizes a health bar system

2: The attacks are different.

3: You can have unlimited lives sometimes.

Buttons:
 * Quick Attack
 * Heavy Attack
 * Special Attack
 * Block
 * Jump
 * Super Attack
 * EX Attack
 * Pick up Item
 * Taunt

Stages

 * City 17 (Half-Life) Hazards: Zombies, Fast Zombies, Poison Zombies, Headcrabs, Combine Soldiers, Dropships, Stalkers
 * Well (Team Fortress 2) Hazards: Train, Scouts, Sentries, Spies, Medics, Snipers, (You get the point)
 * Aperture Science (Portal) Hazards: Turrets, Rocket Turrets, Panels, Crushers
 * Dust (Counter-Strike) Hazards: Terrorists, Counter-Terrorists, Bombs, Explosive Barrels
 * Pandora (Borderlands) Hazards: Psychos, Bullymongs, Crystalisks, Threshers, Skags, Marauders
 * Purity Biome (Terraria) Hazards: Slimes, Harpies, Wyverns, Zombies, Corrupted Bunnies, Corrupted Goldfish, Wandering Eyes, Doctor Bones
 * Whiterun (Skyrim) Hazards: Dragons, Guards, Warlocks, Trolls, Bears, Giants
 * Battlegrounds (Chivalry)
 * Green Run (Call of Duty)
 * Holly Street (Left 4 Dead) Hazards: Common Infected, Hordes, Boomers, Hunters, Smokers, Spitters, Witch, Wandering Witch
 * Backyard (Plants VS Zombies) Hazards: Zombies (All varieties but Catapult, Yeti, and Dr. Zomboss), Plants (All but Imitator)
 * Siege of Sparta (Rome: Total War) Hazards: Warriors, Catapults, Spears, Arrows
 * 2 Fortresses (Team Fortress Classic) Hazards: Scouts, Snipers, Spies, Heavy Weapons Guys, Soldiers,
 * Freddy Fazbear's (Five Nights at Freddy's)

Items

 * Health Packet: Restores health. Appearance changes depending on stage.
 * Grenade (Half-Life): Explodes when thrown.
 * Sentry Turret (Team Fortress 2): Shoots whoever comes close except the one who spawned it.
 * Level 2 Sentry (Team Fortress 2): Stronger than regular Sentry, but slower aiming, and takes longer to set up.
 * Level 3 Sentry (Team Fortress 2): Strongest, but slowest Sentry.
 * Mini-Sentry (Team Fortress 2): Shoots faster than normal Sentry, but does not cause any knockback.
 * Pills (Left 4 Dead): Increase Movement speed.
 * Jockey (Left 4 Dead): Chases enemies around and jumps on them, throwing them off-balance, slowing them down, and slightly draining their health.
 * Terra Blade (Terraria): Standard bludgeoning weapon.
 * Rocket Launcher (Terraria): Shoots rockets.
 * Shield (Borderlands): Can take 3 hits for the player.

Modes

 * Arcade mode
 * Versus
 * Challenge
 * Online
 * Options
 * Bonus
 * Store

Credits
I OWN NOTHING. P.S. if you have an idea, please leave it in a concise comment below. Thanks!