video game, Metal Slug Anthology, PlayStation 2, side-scrolling, shooter, pixel art, retro style, collection, arcade, action-packed, military, tanks, explosions, diverse characters, power-ups, cooperative gameplay, vibrant backgrounds, fast-paced, boss fights, detailed sprites, 2D graphics, dynamic lighting, nostalgic, classic, compilation, seven games, run and gun, enemy soldiers, aliens, humorous animations, intense battles, multi-path levels, weapon upgrades, local multiplayer, vintage sound effects, engaging soundtrack, responsive controls, full-screen mode, memory card support, save feature, unlockable content, widescreen support, PAL and NTSC compatibility, smooth frame rate, sprite scaling, parallax scrolling.