Thankyou for taking interest in Surround'Em.
I kept the graphics for Surround'Em simple and actually wanted to gave it a retro look. I wanted something like 80x48 pixel mode (graphics 5), but figured it would had run out of room fast, so used 160x96 (graphics 7) that with with double height PM graphics. It runs much faster than Surround. I had to re-work my player/missile multiplexer routine to work with 128 byte high player/missile areas. Instead of doing separate games on a multigame cartridge, Surround'Em can optionally play many different Surround type games like 2600 Surround, VIC-20 Slither, and a Dodge Survival Game. Like 2600 Surround, it can activate diagonals movement, progressively increase speed during the game, wrap-around mode, and pressing fire can stop the path from being drawn.
There are many options screen when the title splash screen that lets you choose how you want to play the game, including up to 4 multiplayer. Four player mode can be done using an Atari 800 or using the Multijoy8 interface for the XL/XE machines, although it is only a 4 player game. Multijoy8 will only activate if you select it on the title screen, or else it defaults to standard reading PORTA and PORTB. Joysticks are just about the only controller you can play thing type of game with.
This game is Atari 8-bit universal, does not use the RAM under ROM and use OS VBI and DMI immediate vectors. When running on NTSC machines in North America, The game VBI is executed at 50 frames per second so it runs the same speed as PAL/SECAM machines in Europe. The game also looks great on HDTV set ups.