Posted about World of Padman before, but felt like posting about it again, this time with a video of gameplay.
If you like lighthearted games and arena shooters, it's well worth giving a look. Also I love the attention to detail on the first map in this video, putting jump pads on the mouse traps is so good.
World of Padman is a delightful freeware arena shooter with an impressive amount of work put into it! It's meant more for multiplayer, but the bots are pretty fun to play against too!