This unnecessarily fun free FPS starring protogens is mechanically really fun, like a cross between multiple popular shooters. At some point bot support was added so you can play MP modes solo.

Another great platform fighter with Nickelodeon characters. Some from the first game are missing, but there are some other fan favorites and a roguelite story mode. Obvious offline bot support is yes.

Holy CRAP, this game's launch into Early Access was among the roughest I've seen. In spite of that, the dev is actively trying to fix it and it seems to be in a okay state now, tho still very WIP.

8 Great classic fighting games from Capcom's past. This one actually contains an offline versus mode at launch, allowing single VS CPU matches. Still waiting on this feature for the first collection.

An excellent classic racing title from Sega. Has singleplayer modes where you race the CPU, as you'd expect.

A simple Mario Kart inspired racing game. Obviously, it supports bots, splitscreen, and is available for a low price. There's no battle mode, but there are 9 characters and about 18 or so tracks.

This is a singleplayer MMORPG. All the other players are bots and it's completely playable offline. There's no simulated PVP (maybe someday). I don't even like MMORPG gameplay, and i like this.

A souls-like game focused solely around PVP. The concept is good, and it even has bot support via practice mode, but I have difficulty telling what's my skill and what's jank within the game.

A collection of classic arcade fighting games involving Marvel and Capcom IPs. Each game (except 1 because it's a different genre) has an arcade mode and versus mode to fight a series of bots offline.

This is a weird inclusion, but with the banned footage DLC you get access to a gruesome version of Blackjack you get to play VS a bot. There's also a PVP version on Roblox.